Conjugate addition to 3-arylsulfinylchromones as a synthetic route to homochiral 2-substituted chromanones: scope and limitations
作者:Kevin J Hodgetts、Konstantina I Maragkou、Timothy W Wallace、Robert C.R Wootton
DOI:10.1016/s0040-4020(01)00615-9
日期:2001.7
A route to homochiral 2-substituted chromanones via the diastereoselective conjugate addition of organocopper reagents to 3-(p-tolylsulfinyl)chromones has been improved and used to prepare 2,6-dimethylchromanone (S)-4 and LL-D253α methyl ether (S)-6. The attempted preparation of a 2-phenylchromanone (flavanone) using this strategy was unsuccessful due to the lability of the intermediate 2-phenyl-3
通过将有机铜试剂非对映选择性共轭加成到3-(对甲苯磺亚磺酰基)色酮上的方法制备纯手性2-取代的苯并二氢吡喃酮已得到改进,并用于制备2,6-二甲基苯并二氢吡喃酮(S)-4和LL-D253α甲基醚(S)-6。由于中间体2-苯基-3-(对甲苯磺酰亚胺基)苯并二氢吡喃酮在室温下不易被亚砜消除而得到相应的2-苯基苯并二氢苯并酮,因此使用该策略尝试制备2-苯基苯并二氢吡喃酮(黄酮)是不成功的。(黄酮)。