作者:Yuta Onuki、Hisanori Nambu、Takayuki Yakura
DOI:10.1248/cpb.c20-00132
日期:2020.5.1
cyclohexane-1,3-dione-2-spirocyclopropanes using dimethylsulfoxonium methylide proceeded regioselectively to produce 2,3,4,6,7,8-hexahydro-5H-1-benzopyran-5-ones in good to high yields. The reactions of cycloheptane- and cyclopentane-1,3-dione-2-spirocyclopropanes could construct [7.6]- and [5.6]-fused ring systems. This reaction was also carried out using sulfoxonium ethylide, butylide, and benzylide
使用二甲基硫代methyl鎓亚甲基对环己烷-1,3-二酮-2-螺环丙烷进行开环环化反应,选择性地生成2,3,4,6,7,8-六氢-5H-1-苯并吡喃-5-酮产量。环庚烷和环戊烷-1,3-二酮-2-螺环丙烷的反应可以构建[7.6]-和[5.6]稠合的环系统。该反应还使用亚乙基ethyl鎓,丁基化物和苄基化物进行,从而以高至高收率形成相应的2,3-反式-二取代产物,并且表明二甲基可以用作假取代基。 。发现2-和3-苯并六氢苯并吡喃-5-酮可以容易地分别转化为5-羟基黄烷和5-羟基异黄烷。