%0 Journal Article %T High stereoselective cyclopropanation reaction of 3-acylcoumarins with e£¿£¿£¿-bromoketones at room temperature %A De-Bing She %A Guo-sheng huang %A Hao-Hao Hui %A Min Chen %A Ming-Yu Yang %A Qin Zhao %J - %D 2008 %U https://www.ias.ac.in/describe/article/jcsc/120/04/0391-0394