Through a double cyclization triplet carbonylcarbenes add smoothly to double bonds in the δ and ε position, but do not react intramolecularly with C-H bonds (see scheme). The addition reaction fails if the keto group is replaced with an ester group.
Tandem RCM of Dienynes for the Construction of Taxol-Type Carbocyclic Systems
作者:Rebeca Garcia-Fandiño、Eva M. Codesido、Eduardo Sobarzo-Sánchez、Luis Castedo、Juan R. Granja
DOI:10.1021/ol036062m
日期:2004.1.1
[GRAPHICS]Tandem ring-closing metathesis of hydrindanone dienynes allows access to taxosteroids, a new class of compounds that combine the [5.3.1] carbocyclic system of taxanes with rings C and D of the steroid skeleton.
Fairfax David J., Austin David J., Xu Simon L., Padwa Albert, J. Chem. Soc. Perkin Trans. 1, (1992) N N21, S 2837-2844
作者:Fairfax David J., Austin David J., Xu Simon L., Padwa Albert