Stille/Diels−Alder Reaction Sequences: Diversity-Oriented Access to Novel Steroids
作者:Hans Wolf Sünnemann、Anja Hofmeister、Jörg Magull、Martin G. Banwell、Armin de Meijere
DOI:10.1021/ol062878m
日期:2007.2.1
[reaction: see text] An efficient, diversity-oriented approach to novelsteroid analogues possessing a C-5beta configuration begins with the Stille cross-coupling of enantiomerically pure cycloalkenylstannane trans-2 and enol triflate 3. The resulting diene trans-4 engages in Diels-Alder cycloaddition reactions with a range of dienophiles to give, after removal of protecting groups, biologically interesting