Mercaptoacetate Derivatives. I. Reaction of Thiocyanatoacetic Esters with Aldehydes
作者:Toshio Hayashi
DOI:10.1246/bcsj.45.1507
日期:1972.5
An equimolar reaction of thiocyanatoacetic esters with aromatic aldehydes in the presence of sodium hydride, followed by treatment with hydrogen chloride, led to a mixture of 4-alkoxycarbonyl-5-aryl-2-imino-1,3-oxathiolane hydrochloride (3) and α-(S-carbamoylthio)-βchlorodihydrocinnamic ester (4). When excess aldehyde was used in the reaction, a small amount of 2,10-bis(α-chlorobenzyl)-4,8-dioxo-6-phenyl-5
在氢化钠存在下,硫氰基乙酸酯与芳香醛发生等摩尔反应,然后用氯化氢处理,生成 4-烷氧基羰基-5-芳基-2-亚氨基-1,3-氧杂硫杂环戊烷盐酸盐 (3) 和α-(S-氨基甲酰硫基)-β氯二氢肉桂酸酯 (4)。当反应中使用过量醛时,得到少量的2,10-双(α-氯苄基)-4,8-二氧-6-苯基-5,7-二氮杂-3,9-二硫十一烷二酸酯(5) ,以及产物3和4。NMR研究表明,分离的产物3全部存在于一种异构体中,该异构体具有环中单键附近的4-酯和5-芳基顺式。表明产物 4 是由 3 的反式异构体重排形成的。