Ki. Bookermilburn et Df. Thompson, TANDEM RING EXPANSION-CYCLIZATION REACTIONS - SYNTHESIS OF THE BICYCLO-[4.3.0]-NONANE AND BICYCLO-[6.3.0]-UNDECANE RING-SYSTEMS, Synlett, (8), 1993, pp. 592-594
Ferric chloride induced ring expansion-cyclisation of cyclopropyl sily
l ether derivitives provided access to functionalised [4.3.0] and [6.3
.0] carbocycles.