摘要 α-甲酰基乙烯酮二硫缩醛是合成多种有机化合物(包括嘧啶及其功能化材料)的活性前体。本研究通过实验和理论方法处理从 α-甲酰基乙烯酮二硫缩醛家族到官能化嘧啶衍生物形成的固体代表性化合物的结构多功能性。2-(3,4-二甲氧基苯甲酰基)-3,3-双(甲基硫基)丙-2-烯醛,代表性化合物是根据报道的方案合成的,并通过光谱方法进行表征。完整的三维固态结构研究是利用单晶 X 射线晶体学技术以及经典和加速分子动力学模拟等理论方法进行的。
These precursors are easily accessible from aryl methyl ketones. Various functional groups like alkyl, aryl, nitrile, amine, aroyl and thiomethyl can be directly installed to the benzene ring. The one-pot approach for the construction of thiomethylated-benzene nucleus was also developed. The structure of the synthesized compound was confirmed by X-ray crystallography.
α-oxoketenedithioacetals 1a–l are subjected to fluorination using selectfluor 2 to yield the corresponding stable α-fluoro-α-oxoketenedithioacetals 3a–l in 61–75% overall yields. In Route 2 a four-componentone-pot protocol was followed involving addition of a mixture of active methylene ketone and carbon disulfide to sodium tert-butoxide suspended in tetrahydrofuran and dimethylformamide followed by
Base catalyzed reaction of 1,4-dithiane-2,5-diol with α-oxoketene dithioacetals: a new general method for the synthesis of 2-methylthio-3-aroyl/heteroaroyl thiophenes
The α-oxoketene dithioacetals and 1,4-dithiane-2,5-diol a dimer of mercapto acetaldehyde, react in the presence of anhydrous potassium carbonate in boiling ethanol to yield the corresponding 2-(methylthio)-3-aroyl/heteroaroyl thiophenes in 55–70% overall yields.
The reaction of 2-aroyl-3,3-bis(alkylsulfanyl)acrylaldehydes and hydroxylamine hydrochloride: Facile synthesis of differently substituted isoxazoles
作者:Annie Mathews、Karunalayam A. Sasikala、Sholly C. George、Kooramattom U. Krishnaraj、Naduthottiyil K. Sreedevi、Marathu Prasanth、Engoor R. Anabha、Karakkattu S. Devaky、Chittoorthekkathil V. Asokan
DOI:10.1002/jhet.5570450605
日期:2008.11
3-(methylsulfanyl)-5-phenyl-4-isoxazolecarbonitriles and 5-aryl-3-(methylsulfanyl)-4-isoxazolecarbaldehyde oximes in good yields by varying the substratereagent stoichiometry and temperature of the reaction medium.
Synthesis and antileishmanial activity of novel 2,4,6-trisubstituted pyrimidines and 1,3,5-triazines
作者:Naresh Sunduru、Nishi、Shraddha Palne、Prem M.S. Chauhan、Suman Gupta
DOI:10.1016/j.ejmech.2009.01.016
日期:2009.6
A series of 2,4,6-trisubstituted pyrimidines and 1,3,5-triazines have been synthesized and screened for their in vitro and in vivo antileishmanial activity against Leishmania donovani. Among all, 14 compounds have shown promising inhibition of 80-100% at 10 mu g/ml against promastigotes and IC50 in the range of 0.89-9.68 mu g/ml against amastigotes. Three compounds 13, 32 and 33 with good selectivity index (S.I.) were screened for their in vivo activity in golden hamsters (Mesocricetus auratus) infected with MHOM/IN/80/Dd(8) strain of L. donovani and have shown moderate in vivo inhibition of 48-56% at a dose of 50 mg/kg x 5, i.p. route for 5 days. (C) 2009 Published by Elsevier Masson SAS.