Pyrimidines

On October 14, 2021, Pomogaev, Vladimir; Lee, Seunghoon; Shaik, Sason; Filatov, Michael; Choi, Cheol Ho published an article.Electric Literature of 65-71-4 The title of the article was Exploring Dyson’s Orbitals and Their Electron Binding Energies for Conceptualizing Excited States from Response Methodology. And the article contained the following:

The MO concept is a useful tool, which relates the mol. ground-state energy with the energies (and occupations) of the individual orbitals. However, anal. of the excited states from linear response computations is performed in terms of the initial state MOs or some other forms of orbitals, e.g., natural or natural transition orbitals. Because these orbitals lack the resp. energies, they do not allow developing a consistent orbital picture of the excited states. Herein, we argue that Dyson’s orbitals enable description of the response states compatible with the concepts of MO theory. The Dyson orbitals and their energies obtained by mixed-reference spin-flip time-dependent d. functional theory (MRSF-TDDFT) for the response ground state are remarkably similar to the canonical MOs obtained by the usual DFT calculation For excited states, the Dyson orbitals provide a chem. sensible picture of the electronic transitions, thus bridging the chasm between orbital theory and response computations. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Electric Literature of 65-71-4

The Article related to dyson orbital electron binding energy excited state response methodol, General Physical Chemistry: General Theories and other aspects.Electric Literature of 65-71-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On July 22, 2015, Wang, Bin; Li, Xuting; Li, Jinliang published a patent.Reference of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate The title of the patent was Composition for treating diarrhea in livestock and poultry and preparation method thereof. And the patent contained the following:

The title composition for treating diarrhea in livestock and poultry comprises norfloxacin lactate, mequindox, trimethoprim lactate, atropine and adjuvant (DMSO, etc.), and can be formulated into granules, tablets, powders, unguents or injections. The invention also provides a preparation method of the composition The inventive composition has quick action, good antimicrobial effect, reduced probability of drug resistance of bacteria, increased antimicrobial sensitivity, simple preparation process, and no drug residue, can prevent infection and secondary infection, and is suitable for treating diarrhea in livestock and poultry. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Reference of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

The Article related to veterinary medicine norfloxacin lactate mequindox trimethoprim atropine, Pharmaceuticals: Formulation and Compounding and other aspects.Reference of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On May 13, 2021, Park, Woojin; Lee, Seunghoon; Huix-rotllant, Miquel; Filatov, Michael; Choi, Cheol ho published an article.Category: pyrimidines The title of the article was Impact of the Dynamic Electron Correlation on the Unusually Long Excited-State Lifetime of Thymine. And the article contained the following:

Non-radiative relaxation of the photoexcited thymine in the gas phase shows an unusually long excited-state lifetime, and, over the years, a number of models, i.e., S1-trapping, S2-trapping, and S1&S2-trapping, have been put forward to explain its mechanism. Here, we investigate this mechanism using non-adiabatic mol. dynamics (NAMD) simulations in connection with the recently developed mixed-reference spin-flip time-dependent d. functional theory (MRSF-TDDFT) method. We show that the previously predicted S2-trapping model was due to an artifact caused by an insufficient account of the dynamic electron correlation. The current work supports the S1-trapping mechanism with two lifetimes, τ1 = 30 ± 1 fs and τ2 = 6.1 ± 0.035 ps, quant. consistent with the recent time-resolved experiments Upon excitation to the S2 (ππ*) state, thymine undergoes an ultrafast (ca. 30 fs) S2→S1 internal conversion and resides around the min. on the S1 (nOπ*) surface, slowly decaying to the ground state (ca. 6.1 ps). While the S2→S1 internal conversion is mediated by fast bond length alternation distortion, the subsequent S1→S0 occurs through several conical intersections, involving a slow puckering motion. The experimental process involved the reaction of 5-Methylpyrimidine-2,4(1H,3H)-dione(cas: 65-71-4).Category: pyrimidines

The Article related to impact dynamic electron correlation long excited state lifetime thymine, General Physical Chemistry: General Theories and other aspects.Category: pyrimidines

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On February 17, 2010, Xu, Kefu published a patent.Computed Properties of 23256-42-0 The title of the patent was Pharmaceutical composition comprising sulfamonomethoxine sodium and olaquindox for treating chicken vibrionic hepatitis and preparation method thereof. And the patent contained the following:

The inventive pharmaceutical composition is prepared from (by weight percentage) sulfamonomethoxine sodium 5-20, olaquindox 2-15, trimethoprim lactate 1-4, glucurolactone 1-10, taurine 2-10 and anhydrous glucose in balance by pulverizing raw materials sep., and mixing for 1 h. The composition is used for treating chicken vibrionic hepatitis. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Computed Properties of 23256-42-0

The Article related to veterinary sulfamonomethoxine sodium olaquindox chicken vibrionic hepatitis, Pharmaceuticals: Formulation and Compounding and other aspects.Computed Properties of 23256-42-0

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On April 9, 2014, Liu, Changdou published a patent.Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate The title of the patent was Compound levofloxacin hydrochloride soluble powder for treating respiratory system disease of poultry. And the patent contained the following:

The title compound levofloxacin hydrochloride soluble powder is prepared by mixing the following components: levofloxacin hydrochloride 2-10%, azithromycin 2-10%, Bufonis Venenum 2-6%, licorice extract 10-30%, Kameiding 3-9%, trimethoprim lactate 1-5%, and the balance of pharmaceutically applicable auxiliary materials (sucrose, anhydrous glucose, oral glucose, and/or starch). The invention adopts the latest market medicine, traditional Chinese medicinal extract, novel antiasthmatic medicine and medicine synergist compound into compound preparation, and has antiinflammatory, antibacterial, antiviral, heart tonifying, cough relieving, anti-allergic, poultry disease resistance and immunity increasing, damaged mucosa repairing, secondary infection controlling, and poultry respiratory system disease treating effects. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

The Article related to levofloxacin hydrochloride soluble powder respiratory system disease poultry, Pharmaceuticals: Formulation and Compounding and other aspects.Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On August 1, 2012, Ouyang, Wuqing; Zhou, Ying; Ouyang, Shenyu published a patent.Electric Literature of 23256-42-0 The title of the patent was Rifaximin and trimethoprim lactate compounded nanoemulsion and its preparation method. And the patent contained the following:

The compounded nanoemulsion is composed of surfactant 30-45, cosurfactant 1-10, oil phase 1-16, rifaximin 0.1-5, trimethoprim lactate 0.025-1.25 wt%, and addnl. deionized water. The surfactant is one or more of EL-40, RH-40, Tween-80, and poloxamer 188. The cosurfactant is one or more of anhydrous ethanol, 1,2-propanediol, glycerol, and polyethylene glycol-400. The oil phase is one or more of iso-Pr myristate, glyceryl triacetate, Et oleate, wheat germ oil, Et acetate, and Bu acetate. The preparation method comprises weighing surfactant, cosurfactant, oil phase, rifaximin, trimethoprim lactate and deionized water according to the formula, mixing surfactant with cosurfactant, then adding oil phase, mixing, adding rifaximin, mixing, adding trimethoprim lactate, mixing, and adding deionized water while stirring. This nanoemulsion is suitable for treatment of acute and chronic intestinal tract infection, diarrhea syndrome, etc., and has the characteristics of rapid and persistent effect, high safety and wide market prospect. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Electric Literature of 23256-42-0

The Article related to rifaximin trimethoprim lactate compounded nanoemulsion acute diarrhea composition, Pharmaceuticals: Formulation and Compounding and other aspects.Electric Literature of 23256-42-0

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On December 12, 2012, Zhou, Qingfu; Liu, Wenli published a patent.COA of Formula: C17H24N4O6 The title of the patent was Compound neomycin sulfate composition for treating purulent abscess of pets and preparation method thereof. And the patent contained the following:

The compound neomycin sulfate composition comprises neomycin sulfate 1-3, erythromycin thiocyanate 3-5, trimethoprim lactate 1-2, CTMB 1-3, menthol 3-5, liquid paraffin 50-70, glycerol 7-9, ethylparaben 0.4, essence 1-3, and distilled water 80-113 weight part, and can be processed into cream by conventional method and used for treating purulent abscess of pets, with rational formulation, simple preparation process, and obvious curative effect. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).COA of Formula: C17H24N4O6

The Article related to neomycin sulfate erythromycin thiocyanate trimethoprim lactate pet purulent abscess, Pharmaceuticals: Formulation and Compounding and other aspects.COA of Formula: C17H24N4O6

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On March 27, 2020, there was a patent about pharmaceutical powders, veterinary medicine.Recommanded Product: 23256-42-0 The title of the patent was Method for preparing pharmaceutical soluble powder comprising florfenicol and trimethoprim lactate. And the patent contained the following:

The pharmaceutical soluble powder comprises the following components in parts by weight (g): 9-11 each of florfenicol and anhydrous citric acid, 1.5-2.5 of trimethoprim lactate, and the balance is anhydrous glucose. The preparation method of pharmaceutical soluble powder includes: mol. sieving and weighing the florfenicol, anhydrous citric acid, and trimethoprim lactate, adding all the material into anhydrous glucose, premixing and dispersing for 1 h to obtain the pharmaceutical soluble powder. The present invention discloses a pharmaceutical soluble powder having high efficiency, synergist effect, capable of dissolving the components rapidly, and wide application in veterinary medicines. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Recommanded Product: 23256-42-0

The Article related to florfenicol anhydrous citric acid trimethoprim lactate pharmaceutical soluble powder, Pharmaceuticals: Formulation and Compounding and other aspects.Recommanded Product: 23256-42-0

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On November 23, 2016, Chen, Wei published a patent.Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate The title of the patent was A compound niacin injection, its preparation method and application for treating human intestinal diseases. And the patent contained the following:

The compound niacin injection is prepared from: main agent 10-20, additive 6-10, and solvent 400-500 weight parts. The main agent is formulated from: nicotinic acid 6-10, berberine sulfate 2-4, or atropine sulfate 6-8, mequindox 3-5, trimethoprim lactate 12-16, and Chinese medicine extracting solution 5-7 weight parts; the additive is formulated from sodium sulfite 2-3, sodium thiosulfate 1-2, and disodium edetate 0.6-1 weight parts. The Chinese medicine extracting solution is prepared by extracting Herba Andrographis 6-8, Herba Dendrobii 4-6, Radix Et Rhizoma Rhei 3-5, and Flos Carthami 6-8 with alc. 40-50 weight parts. The preparation method includes extracting with ethanol, cooling, filtering, dialyzing, supplying solvent, and stirring well. The invented compound niacin injection can be used for treating intestinal tract diseases of human body, it has good effect for inhibiting bacteria such as escherichia coli, staphylococcus, and helicobacter in human intestinal tract, and its curative effect is better than the single preparation of each medicine, and it has reasonable formula, the used raw materials are all the efficient drugs for resisting intestinal bacteria infection, and are safe to use, and have obvious curative effect. The experimental process involved the reaction of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate(cas: 23256-42-0).Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

The Article related to compound niacin injection preparation chinese medicine extract natural pharmaceutical, Pharmaceuticals: Formulation and Compounding and other aspects.Safety of 5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diamine 2-hydroxypropanoate

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

On September 6, 2019, Li, Xue-Dong; Gao, Yu-Ting; Sun, Ying-Jie; Jin, Xiao-Yang; Wang, Dong; Liu, Li; Cheng, Liang published an article.Recommanded Product: 6-Methylpyrimidine-2,4(1H,3H)-dione The title of the article was A NaI/H2O2-Mediated Sulfenylation and Selenylation of Unprotected Uracil and Its Derivatives. And the article contained the following:

An efficient iodide-catalyzed/hydrogen peroxide mediated sulfenylation and selenylation of unprotected uracil and its derivatives with simple thiols and diselenides was established. This coupling tolerates a broad variety of functional groups to provide diverse 5-sulfur/selenium-substituted uracil derivatives in good to excellent yields (up to 93%). The experimental process involved the reaction of 6-Methylpyrimidine-2,4(1H,3H)-dione(cas: 626-48-2).Recommanded Product: 6-Methylpyrimidine-2,4(1H,3H)-dione

The Article related to sodium iodide hydrogen peroxide sulfenylation selenylation unprotected uracil derivative, General Organic Chemistry: Synthetic Methods and other aspects.Recommanded Product: 6-Methylpyrimidine-2,4(1H,3H)-dione

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia