作者:Stefanie Körbe、Armin de Meijere、Thomas Labahn
DOI:10.1002/1522-2675(200210)85:10<3161::aid-hlca3161>3.0.co;2-2
日期:2002.10
cycloaddition with suitable dienophiles in one-pot operations gave hexahydroindenes 8 and 9 in yields of 40–78%, an hexahydro-s-indacene derivative 13 could be obtained in up to 25% yield with cyclopent-2-en-1-one (10) as a dienophile in the presence of different Lewis acids, and a spirocyclopentane-hexahydroindenone 18 could be isolated in 72% yield. When in-situ-formed iminium salts were used as heterodienophiles
钯催化的 2-溴 1,6-二烯的分子内反应,然后在单锅操作中与合适的亲双烯体进行分子间 [4+2] 环加成反应,得到六氢茚 8 和 9,产率为 40-78%,即六氢-s-茚并烯在不同的路易斯酸存在下,使用 cyclopent-2-en-1-one (10) 作为亲二烯体,可以以高达 25% 的收率获得衍生物 13,并且可以以 72% 的收率分离螺环戊烷-六氢茚酮 18。当原位形成的亚胺盐用作异二烯体时,可以通过一锅两步操作以 29-46% 的收率获得 hexahydro-1H-[2]pyrindinols 31。