Spirocyclopropane compounds. I. Synthesis and reactivity of spiro(cyclopropane-1,2'-(2H)indol)-3'(1'H)-ones.
作者:MITSURU KAWADA、YASUHIKO KAWANO、HIROSADA SUGIHARA、SABURO TAKEI、ISUKE IMADA
DOI:10.1248/cpb.29.1900
日期:——
A spirocompound, 1'-acetylspiro [cyclopropane-1, 2'-[2H] indol]-3'(1'H)-one (III-1), was synthesized from anthranilic acid in three steps, which involve the condensation of anthranilic acid with α-bromo-γ-butyrolactone, followed by spiroannelation with acetic anhydride and triethylamine, and subsequent decarboxylation in the presence of sodium chloride to afford III-1 in good yield. Various derivatives (III-2-III-9) were similarly prepared. Some compounds of this series showed an intense fluorescence in solution. The reactivities of III-1 to electrophiles and nucleophiles, as well as its reaction with reducing agents, were investigated.
以蒽酸为原料,分三步合成了一种螺化合物--1'-乙酰螺[环丙烷-1,2'-[2H] 吲哚]-3'(1'H)-酮(III-1),包括蒽酸与 α-溴-γ-丁内酯缩合,然后用醋酸酐和三乙胺进行螺道反应,随后在氯化钠存在下进行脱羧反应,得到 III-1,收率良好。类似地还制备出了各种衍生物(III-2-III-9)。该系列的一些化合物在溶液中显示出强烈的荧光。研究了 III-1 与亲电体和亲核体的反应活性,以及与还原剂的反应。