Synthetic studies on diuretics. 5-(3,3-N,S-substituted-2-propenoyl)-2,3-dihydro-2-benzo(b)furancarboxylic acids.
作者:Eiichi OHSUGI、Toshihiro FUJIOKA、Hiroshi HARADA、Masuhisa NAKAMURA、Ryozo MAEDA
DOI:10.1248/cpb.37.1268
日期:——
6,7-Dichloro-2,3-dihydro-2-benzo[b]furancarboxylic acid derivatives having a 3,3-N,S-disubstituted-2-propenoyl group at the 5-position were prepared by alkylation of 5-(thiocarbamoyl)acetyl derivatives of the 2,3-dihydro-2-benzo[b]furancarboxylic acid ester or by acetal exchange reaction of 5-[3,3-bis(alkylthio)-2-propenoyl] derivatives. Synthesis of 5-[4 and/or 5-(di)substituted-4-thiazolin-2-ylidene]acetyl-2
通过将5-(-)烷基化,制备在5-位具有3,3-N,S-二取代-2-丙烯酰基的6,7-二氯-2,3-二氢-2-苯并[b]呋喃羧酸衍生物。 2,3-二氢-2-苯并[b]呋喃羧酸酯的硫代氨基甲酰基)乙酰基衍生物或5- [3,3-双(烷硫基)-2-丙烯酰基]衍生物的缩醛交换反应。还可以通过2-卤代反应来合成5- [4和/或5-(二)取代的4-噻唑啉-2-亚烷基]乙酰基-2,3-二氢-2-苯并[b]呋喃羧酸。在碱的存在下或通过2-[[[6,7-二氯-2-甲氧基羰基-2,3-二氢苯并[b]呋喃-5-基]羰基的硫化物收缩,具有5-乙酰基衍生物的-1-甲氧基乙基异硫氰酸酯)-甲硫基]噻唑溴化物。某些合成的化合物在大鼠和小鼠中显示出强大的利钠尿活性。