Catalysis of homo diels-alder reactions by Yb(fod)3
作者:Samuel Danishefsky、Mark Bednarski
DOI:10.1016/s0040-4039(00)98822-1
日期:1985.1
Recyclable organotungsten Lewis acid and microwave assisted Diels–Alder reactions in water and in ionic liquids
作者:I-Hon Chen、Jun-Nan Young、Shuchun Joyce Yu
DOI:10.1016/j.tet.2004.09.078
日期:2004.12
water-soluble, organotungsten Lewisacid, [OP(2-py)3W(CO)(NO)2](BF4)2 (1), was synthesized and characterized. A series of 1-catalyzed Diels–Alderreactions were investigated under conventional heating or microwave heating conditions. The cycloaddition reactions were efficiently conducted in either water or in an ionicliquid, 1-butyl-3-methylimidazolium hexafluorophosphate. The ionicliquid acts as a powerful