Diversity-Oriented Synthesis of Enantiomerically Pure Steroidal Tetracycles Employing Stille/Diels-Alder Reaction Sequences
作者:Hans Wolf Sünnemann、Martin G. Banwell、Armin de Meijere
DOI:10.1002/chem.200800601
日期:2008.8.18
of bicyclo[4.3.0]nonenylstannanes cis-/trans-8 and 14 with cyclohexenol triflates 17 and 18 and subsequent Diels-Alder reactions of the resulting dienes. The enantiomerically pure bicyclo[4.3.0]nonenylstannanes cis- and trans-8 were prepared in good yields via the enol triflates cis- and trans-7, obtained from the bicyclo[4.3.0]non-2-en-3-one 5. The alkenylstannane 14 was obtained from the [2+2] cycloadduct