Syntheses of biodynamic heterocycles: baker’s yeast-assisted cyclocondensations of organic nucleophiles and phenacyl chlorides
作者:Lalit D. Khillare、Umesh R. Pratap、Manisha R. Bhosle、Sambhaji T. Dhumal、Mahendra B. Bhalerao、Ramrao A. Mane
DOI:10.1007/s11164-017-2880-0
日期:2017.8
pyridin-2-amine (2f) at room temperature in presence of baker’s yeast to give fused heterocycles 6-(4-substituted phenyl)-2-phenylimidazo[2,1-b][1,3,4]thiadiazoles (5a–f), 2-(4-substituted phenyl)quinoxalines (6a–f), 6-(4-substituted phenyl)-3-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines (7a–f), and 2-(4-substituted phenyl)H-imidazo[1,2-a]pyridines (8a–f), respectively. The experimental conditions for these
在室温下,在乙腈中作为全细胞酶源的面包酵母(Saccharomyces cerevisiae)存在下,将取代的苯甲酰氯(1a – f)与亲核试剂硫脲(2a)和硫代苯甲酰胺(2b)进行环缩合反应,得到4-(4-取代的苯基) )噻唑-2-胺(3a – f)和4-(取代的苯基)-2-苯基噻唑(4a – f)。此外,取代的苯甲酰氯还与亲核试剂2-氨基-1,3,4-噻二唑(2c),邻苯二胺(2d),1-氨基-2-巯基-5-苯基三唑(2e)和吡啶-2-胺(2f),在面包酵母的存在下于室温下产生稠合的杂环6-(4-取代的苯基)-2-苯基咪唑并[2,1- b ] [1,3,4]噻二唑(5a – f),2-(4-取代的苯基)喹喔啉(6a – f),6-(4-取代的苯基)-3-苯基-7 H- [1,2,4]三唑[3,4] - b ] [1,3,4]噻二嗪(7A - ˚F),和2-(4-取代苯基)ħ -咪唑并[1