spontaneous cyclization into 1,3,4-oxadiazolines has been investigated. Contrary to the literature data, an attempted transformation of isatin cyanoacetylhydrazone in solution generates stereoisomers and not the reported structural isomer oxadiazoline. A similar behavior of the corresponding l-methyl- and l-acetylisatin derivatives even under acetylation conditions has been found. The crystal structure
已经研究了酰基腙自发环化成 1,3,4-恶二唑啉的趋势。与文献数据相反,尝试在溶液中转化
靛红氰基乙酰腙会产生立体异构体,而不是报道的结构异构体恶二唑啉。已发现即使在乙酰化条件下相应的 l-甲基-和 l-乙酰
靛红衍
生物的类似行为。报道了 3-cyanoacetylhydrazono-2-indolinone 一
水合物的 Z 异构体的晶体结构。它在腙NH和
吲哚酮羰基的氧原子之间含有强分子内氢键,这样CN键上的Z异构体就稳定了。© 2009 Wiley Periodicals, Inc. 杂原子
化学 20:183–193, 2009; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc。