Y. Tanabe et al., A NOVEL AND REGIOSELECTIVE RADICAL CYCLIZATION OF GEM-DIHALOCYCLOPROPYL SUBSTITUTED ALKENES AND ALKYNES USING TRIBUTYLTIN HYDRIDE AND CATALYTIC AIBN, Chemistry Letters, (9), 1994, pp. 1757-1760
Various gem-dihalocyclopropyl substituted alkenes and alkynes were tra
nsformed into the corresponding bicyclo[3.1.0]- or [4.1.0] compounds w
ith high regioselectivity through a reductive radical cyclization usin
g tributyltin hydride in the presence of catalytic azobisisobutyronitr
ile (AIBN).