作者:P. Livant、Weizheng Xu
DOI:10.1021/jo9715478
日期:1998.2.1
4-dimethylchroman),4, formed in 85% yield by the reaction of resorcinol with 2,6-dimethyl-2,5-heptadien-4-one (phorone). A number of examples of reactions leading, in quite good yields, to products analogous to 1are presented, as well as some reactions that fail. Flavan 1 is identical to the compound formed by the acid-catalyzed reaction of acetone with excess resorcinol. Compound 1 and a steroidal
已发现间苯二酚与α,β-不饱和酮的酸催化反应的产物分为两类。第一类产物由4-(3,4-二氢-7-羟基-2,4,4-三甲基-2H-1-苯并吡喃-2-基)-1,3-苯二醇1形成间苯二酚与4-甲基-3-戊烯-2-酮(间苯三甲氧化物)的反应产率为91%。第二类产品由(C(2)-对称)2,2'-spirobi(7-羟基-4,4-二甲基苯并二氢吡喃),4说明,通过间苯二酚与2,6的反应可形成85%的收率-二甲基-2,5-庚二烯-4-酮(佛酮)。给出了许多以相当高的产率导致产生类似于1的产物的反应的例子,以及一些失败的反应。黄酮1与通过丙酮与过量的间苯二酚的酸催化反应形成的化合物相同。