Enantioselective ring construction: synthesis of halogenated marine natural spiro[5.5]undecane sesquiterpenes
作者:Julio D. Martin、Cirilo. Perez、Jose L. Ravelo
DOI:10.1021/ja00284a052
日期:1986.11
(-)-33, and (8R,9R)-8-bromo-9-hydroxy-(E)-y-bisabolene, (+)-33, as the basic building blocks. This asymmetric methodology represents a general strategy for the enantioselectiveconstruction of spiro[5S]undecane systems containing a chiral quaternarycenter. This approach should be generally useful for the preparation of a wide variety of six-membered spirocycle-containing natural compounds. The compounds