Intermolecular tandem addition-cyclization of bromoallenes: a facile synthesis of methylenecyclopropyl carboxylates and polysubstituted furans.
The base-mediated reactions of 1,3-dicarbonyl compounds with bromoallenes used as an allyl dication equivalent were explored. The corresponding dimethyl methylenecyclopropane-1,1-dicarboxylates and 2,3,4-trisubstituted furans were efficiently synthesized. [reaction: see text]
Xu
Lubin
L
Department of Chemistry, Zhejiang University (Xixi Campus), Hangzhou 310028, PRC.
Huang
Xian
X
Zhong
Fangrui
F