X-ray Crystal Structures and Conformational Analysis of Bicyclo[5.3.1]undec-1(11)-enes: Twisting versus Pyramidalization in Anti-Bredt Olefins
作者:Geerlig W. Wijsman、Guillermo A. Iglesias、Willem H. de Wolf、Marcus C. Beekman、Friedrich Bickelhaupt、Huub Kooijman、Anthony L. Spek
DOI:10.1021/jo0013195
日期:2001.2.1
The synthesis of several 9,11,11-trihalo[5.3.1]propellanes and their 4-dimethylsila analogues is described. They solvolyze under formation of the corresponding isomeric 7,9,11- trihalobicyclo[5.3.l]undec-1(11)-enes which are "anti-Bredt" olefins with a strained trans double bond in a bridged eight-membered ring; in the presence of nucleophiles such as water or ethanol, the corresponding 7-hydroxy or