作者:Robin D. CLARK、Leland G. KOZAR、Clayton H. HEATHCOCK
DOI:10.1055/s-1975-23860
日期:——
Round Trip Radical Reactions from Acyclic Precursors to Tricyclo[5.3.1.0<sup>2,6</sup>]undecanes. A New Cascade Radical Cyclization Approach to (±)-Isogymnomitrene and (±)-Gymnomitrene
作者:Brian P. Haney、Dennis P. Curran
DOI:10.1021/jo9914871
日期:2000.4.1
The synthesis and "round trip radical cyclization" of 11-iodo-2,7,11-trimethyldodec-6-en-5-one are described. The round trip cyclization is a sequence of 5-exo, 6-endo, and 5-exo cyclizations in which the last radical cyclization occurs at the same carbon atom as the initial radical generation. The key second (6-endo) cyclization produces two stereoisomers, one of which cyclizes efficiently to isogymnomitrene