Ti(III)-Catalyzed Cyclizations of Ketoepoxypolyprenes: Control over the Number of Rings and Unexpected Stereoselectivities
作者:Sara P. Morcillo、Delia Miguel、Sandra Resa、Ana Martín-Lasanta、Alba Millán、Duane Choquesillo-Lazarte、Juan M. García-Ruiz、Antonio J. Mota、José Justicia、Juan M. Cuerva
DOI:10.1021/ja411942h
日期:2014.5.14
to control the number of cyclization steps in bioinspired radical (poly)cyclizations involving epoxypolyenes containing keto units positioned along the polyene chain. This approach provides an unprecedentedly straightforward access to natural terpenoids with pendant unsaturated side chains. Additionally, in the case of bi- and tricyclizations, decalins with cis stereochemistry have been obtained as a