Preparation of stable fulvene and difulvene aldehydes from benzaldehydes and an indene-derived enamine: formation of novel indene-fused benzodiazepines and attempted syntheses of di- and tricarbaporphyrinoid systems
作者:Randall N. Davis、Timothy D. Lash
DOI:10.1016/j.tet.2009.10.013
日期:2009.11
Although carbaporphyrins and relatedsystems have been widely studied, far less work has been carried out on the synthesis of porphyrin analogues with more than one carbocyclic subunit. Fulvene aldehydes are potentially valuable intermediates for studies of this type. A versatile methodology has been developed where benzaldehydes are reacted with an indene-derived enamine in the presence of dibutylboron