Ternary condensation of Biginelli thiones, chloroacetic acid, and aldehydes as an effective approach towards thiazolo[3,2-a]pyrimidines and 5-arylidenethiazolidine-2,4-diones
作者:Iryna O. Lebedyeva、Mykhaylo V. Povstyanoy、Aleksey B. Ryabitskii、Vyacheslav M. Povstyanoy
DOI:10.1002/jhet.323
日期:——
the process of ethyl 6‐methyl‐4‐aryl‐2‐thioxo‐1,2,3,4‐tetrahydropyrimidine‐5‐carboxylates condensation with aryl aldehydes and chloroacetic acid the unexpected formation of 5‐arylidenethiazolidine‐2,4‐diones was determined in high yields as the reaction time was increased to 20 h. The latter represent the products of destructive hydrolyzes of ethyl 2‐benzylidene‐7‐methyl‐3‐oxo‐5‐aryl‐2,3‐dihydro‐5H‐[1
在6-甲基-4-芳基-2-硫代氧杂1,2,3,4-四氢嘧啶-5-羧酸乙酯与芳基醛和氯乙酸缩合的过程中,意外地形成了5-芳基萘并噻唑烷-2,4-二酮随着反应时间增加到20小时,可以高产率确定Sn。后者代表的2-亚苄基-7-甲基-3-氧代- 5-芳基-2,3-二氢-5-破坏性水解的产物ħ - [1,3]噻唑并[3,2-一个]嘧啶6-羧酸盐已通过独立合成证明。J.杂环化学。(2010)。