Tag: M.W=100-200

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Enzymatic production of L-cysteine from DL-2-amino-Δ2-thiazoline-4-carboxylic acid by Pseudomonas thiazolinophilum: optimal conditions for the enzyme formation and enzymatic reaction, published in 1978-12-31, which mentions a compound: 2150-55-2, Name is 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, Molecular C4H6N2O2S, Recommanded Product: 2-Amino-4,5-dihydrothiazole-4-carboxylic acid.

Cultivation of P. thiazolinophilum AJ 3854 for the production of the enzyme which could form L-cysteine [52-90-4] from DL-2-amino-Δ2-thiazoline-4-carboxylic acid (I) [2150-55-2] and the reaction conditions of this enzyme were investigated. This enzyme was inducible, intracellular, and growth-associated A marked inactivation of enzyme was observed, especially in the growing phase, but could be prevented by 1∼10 mM Mn2+ or by I as inducer at the mid-logarithmic phase. Enzymic degradation of L-cysteine (or L-cystine [56-89-3]) formed from I could be prevented by the addition of hydroxylamine or semicarbazide. Thus, L-cysteine and L-cystine were quant. produced from I. Optimal pH and temperature of enzymic reaction were 8.2 and 42° (2 h), resp. A sigmoidal reaction curve was observed when intact cells were used as enzyme source, but sonic treatment of cells made the curve linear.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Ethyl oxazole-5-carboxylate, is researched, Molecular C6H7NO3, CAS is 118994-89-1, about Application of Flow Chemistry to the Selective Reduction of Esters to Aldehydes.Electric Literature of C6H7NO3.

The reduction of esters to aldehydes is an important transformation in organic chem. and several reducing agents have been described. However, the use of this reaction in medicinal and natural product chem. is limited due to the instability of the intermediates and the high reactivity of the reaction products. In the current article, the general and selective reduction of esters with lithium diisobutyl-tert-butoxyaluminum hydride (LDBBA) in flow is reported. This reagent allows esters to be reduced in the presence of different functional groups, including those considered to be of similar or higher reactivity.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Effect of DL-ATC on the production of L-cysteine with enzymatic method by Pseudomonas sp. TS1138, published in 2008-06-25, which mentions a compound: 2150-55-2, Name is 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, Molecular C4H6N2O2S, Formula: C4H6N2O2S.

L-cysteine is an elementary S-containing amino acid, which has been widely used in medicines, food additives, and cosmetics. Effect of DL-ATC on the conditions of enzyme production process by Pseudomonas sp. TS1138 and enzymic transformation of L-cysteine was discussed. The results show that DL-ATC add in the medium has an inducible impact on enzyme production On account of the interaction of the L-cysteine yield and conversion ratio of DL-ATC, the optimal concentration of DL-ATC is confirmed at about 9 g/L-1. The L-cysteine yield is increased by 56.25% with the DL-ATC interval feeding method.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Optimization of fermentation conditions of microbial enzymatic synthesis of L-cysteine》. Authors are Kou, Guang-hui; Huai, Li-hua; Bai, Gang; Yang, Wen-bo.The article about the compound:2-Amino-4,5-dihydrothiazole-4-carboxylic acidcas:2150-55-2,SMILESS:O=C(C1N=C(N)SC1)O).Formula: C4H6N2O2S. Through the article, more information about this compound (cas:2150-55-2) is conveyed.

Pseudomonas sp. TS1138 was used as the test strain to produce L-cysteine, and microbial enzymic synthesis of L-cysteine was studied. In the medium optimization, it was found that glucose and urea were the best carbon and nitrogen source for enzyme production, resp. Effect of DL-2-amino-Δ2-thiazoline-4-carboxylic acid (DL-ATC) on enzyme production was carried out, and the exptl. result showed that a initial concentration of 5 g/L DL-ATC was found to be optimal for enzyme production Effects of inoculum size, initial pH and liquid volume on enzyme production were investigated. The results indicated that the optimum inoculum size was 10%, and the optimum initial pH was 8.0. The optimum liquid volume was 40 mL culture medium in a 500 mL shaking flask.

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Application In Synthesis of Ethyl oxazole-5-carboxylate. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Ethyl oxazole-5-carboxylate, is researched, Molecular C6H7NO3, CAS is 118994-89-1, about Cobalt-Catalyzed Decarboxylative 2-Benzoylation of Oxazoles and Thiazoles with α-Oxocarboxylic Acids. Author is Yang, Ke; Chen, Xinyong; Wang, Yuqi; Li, Wanqing; Kadi, Adnan A.; Fun, Hoong-Kun; Sun, Hao; Zhang, Yan; Li, Guigen; Lu, Hongjian.

Cobalt-catalyzed decarboxylative cross-coupling of oxazoles and thiazoles with α-oxocarboxylic acids was developed through an sp2 C-H bond functionalization process. This work represents the first example of cobalt-catalyzed decarboxylative C-H bond functionalization and provides an efficient means of building some important bioactive heteroaryl ketone derivatives

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called A Method for Iodination of Oxazoles at C-4 via 2-Lithiooxazoles, published in 1999-02-05, which mentions a compound: 118994-89-1, Name is Ethyl oxazole-5-carboxylate, Molecular C6H7NO3, Recommanded Product: Ethyl oxazole-5-carboxylate.

Lithiation and sequential iodination of oxazole derivatives gave mixtures of 4-iodooxazole derivatives, 2-iodooxazole derivatives and 2,4-diiodooxazole derivatives Metalation of 5-(4-methylphenyl)oxazole and coupling with 4-iodo-5-(2-phenylethyl)oxazole gave the resp. 2,4′-bisoxazole.

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He, Tao; Li, Hongji; Li, Pinhua; Wang, Lei published an article about the compound: Ethyl oxazole-5-carboxylate( cas:118994-89-1,SMILESS:O=C(C1=CN=CO1)OCC ).Application In Synthesis of Ethyl oxazole-5-carboxylate. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:118994-89-1) through the article.

A novel and simple method for the direct amidation of azoles with formamides has been developed. The reaction could occur smoothly in the presence of tert-Bu perbenzoate (TBPB) as an oxidant under metal- and base-free conditions. Direct dehydrogenative cross-coupling of formamides and azoles generated the corresponding products, e.g. I (X = S, R = Me2N, EtNH; X = O, R = 2-MeC6H4NH, Et2N), in good yields.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Ethyl oxazole-5-carboxylate( cas:118994-89-1 ) is researched.Electric Literature of C6H7NO3.Enriquez-Garcia, Alvaro; Ley, Steven V. published the article 《Total synthesis of the potent antifungal agents bengazole C and E》 about this compound( cas:118994-89-1 ) in Collection of Czechoslovak Chemical Communications. Keywords: antifungal bengazole C E total synthesis. Let’s learn more about this compound (cas:118994-89-1).

The bengazoles are marine natural products with unique structure, containing two oxazole rings flanking a single carbon. They show very potent antifungal activity. The total syntheses of bengazole C and E are described following a convergent route which involves diastereoselective cycloaddition of an appropriately substituted nitrile oxide with a butane-1,2-diacetal-protected alkenediol as the key step.

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Pyrazine – Wikipedia,
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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, is researched, Molecular C4H6N2O2S, CAS is 2150-55-2, about Seizures and selective CA-1 hippocampal lesions induced by an excitotoxic cyanide metabolite, 2-iminothiazolidine-4-carboxylic acid.Related Products of 2150-55-2.

Excitatory amino acid (EAA)-like and excitotoxic properties of the secondary metabolite of cyanide, 2-iminothiazolidine-4-carboxylic acid (2-ICA), were evaluated because of its possible role in cyanide-induced neurotoxicity. Intracerebroventricular (i.c.v.) injections of 2-ICA in mice produced wild-running seizures that were qual. and quant. similar to seizures observed with glutamate. 2-ICA, kainate, and proline seizures were prevented by both the NMDA and non-NMDA antagonists, MK-801 and CNQX, resp. In contrast, NMDA-induced seizures were prevented by MK-801, but not CNQX. When infused i.c.v. in rats over a 7-day period, 2-ICA produced extensive and selective loss of CA-1 pyramidal neurons of the hippocampus. In hippocampal slices preloaded with D-[3H]aspartate, 2-ICA superfusion did not evoke release nor significantly augment potassium-stimulated release of the radiolabeled transmitter. These findings indicate 2-ICA has excitotoxic properties and its role in cyanide neurotoxicity deserves further study.

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Pyrazine – Wikipedia,
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Recommanded Product: 5-Amino-2-fluoropyridine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5-Amino-2-fluoropyridine, is researched, Molecular C5H5FN2, CAS is 1827-27-6, about Solvent and substituent effects on fluorine-19 chemical shifts in some 5-substituted 2-fluoropyridines. Author is Giam, Choo-Seng; Lyle, James L..

The 19F NMR chem. shifts of several 5-substituted 2-fluoropyridines in 4 widely different solvents have been measured. The effects of solvents and substituents on the shifts paralleled those in the benzene series with certain modifications.

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Pyrazine – Wikipedia,
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