All stereoisomers of asperphenamate 1a and patriscabratine 2a were achieved with a high yield,and total synthesis of 2a is firstly described here.The absolute c
THE OILPIELD SURFACE FNGINEERING(OSE)is published bimonthly by OSE EditorialDept.Design & Rescarch Institute of Daqing Oilfield,Heilongjiang Province,People’sR