Reactions of 2-dialkylamino-5-phenyl-1,3-oxathiolium cation with nucleophiles containing an amino group.
作者:KENTARO HIRAI、TERUYUKI ISHIBA
DOI:10.1248/cpb.26.3017
日期:——
Reactions of 2-dialkylamino-1, 3-oxathiolium (I) with amino-nucleophiles provide simple access to a variety of heterocyclic compounds. Thiadiazines and thiazoles were readily obtained from the reaction with hydrazines and ammonia, respectively. The intermediates, which were easily converted into thiazoles, were also isolated. Study of the reaction of 1 with aromatic amines revealed the formation of ring-opened ketones and 2-arylimino-1, 3-oxathioles depending upon the reaction conditions. Reactions of I with aromatic and aliphatic amines in boiling glacial acetic acid resulted in the formation of 2-iminothiazoline derivatives.
2-二烷基氨基-1, 3-氧硫杂环鎓(I)与氨基亲核物的反应可以简单地获得多种杂环化合物。噻二嗪和噻唑分别很容易从与肼和氨的反应中获得。同时还分离出了易于转化为噻唑的中间产物。对 1 与芳香胺反应的研究表明,根据反应条件的不同,会生成开环酮和 2-芳基亚氨基-1,3-氧硫杂环戊烷。I 与芳香胺和脂肪胺在沸腾的冰乙酸中发生反应,生成 2-亚氨基噻唑啉衍生物。