Efficient preparation of enantiomerically pure (E)-γ-hydroxy-α,β-unsaturated p-tolylsulfoxides using lipase-mediated acylations
作者:Victor Guerrero de la Rosa、Mario Ordóñez、José Manuel Llera
DOI:10.1016/s0957-4166(00)00257-3
日期:2000.7
A Convenient Synthesis of (E)-γ-Hydroxy- and (E)-γ-Keto-α,β-Unsaturated Sulfoxides
作者:V Guerrero-de la Rosa
DOI:10.1016/00404-0399(50)0878g-
日期:1995.7.3
Diels–Alder reaction of optically active (E)-γ-keto-α,β-unsaturated p-tolylsulfoxides with cyclopentadiene
作者:Mario Ordóñez、Victor Guerrero de la Rosa、Felipe Alcudia、José Manuel Llera
DOI:10.1016/j.tet.2003.11.047
日期:2004.1
The Diels–Alder reaction of enantiomericallypure (E)-γ-keto-α,β-unsaturated p-tolylsulphoxides 3 with cyclopentadiene give four easily separable diastereomers. The effect of several Lewis acids on the reaction was studied, finding a high endo selectivity with respect to the carbonyl group and moderate π-diastereoselectivity using BF3·Et2O as catalyst. The reactivity of compounds 3 as well as their