Iron(III) catalyzed halo-functionalization of alkynes
摘要:
Aromatic and aliphatic alkynes can be halo-functionalized to alpha,alpha-dihalodimethyl ketals catalyzed by FeCl3 in excellent yields. MeOH is used as a nucleophilic solvent and N-halosuccinimide as the halogen source for this efficient transformation. The resulting alpha,alpha-dibromodimethyl ketals can be converted to the corresponding alpha,alpha-dibromoketones by treatment with 8% FeCl3 in silica gel. (C) 2015 Elsevier Ltd. All rights reserved.
Interaction of zinc enolates prepared from 1-aryl-2,2-dibromoalkanones and zinc with alkyl 3-oxo-1,3-dihydrobenzo[c]oxepine-4-carboxylates
作者:A. A. Glukhov、N. F. Kirillov、S. N. Shurov、M. I. Vakhrin、O. A. Maiorova
DOI:10.1134/s1070363209090151
日期:2009.9
Zinc enolates obtained from substituted 1-aryl-2,2-dibromoalkanones and zinc react with alkyl 3-oxo-1,3-dihydrobenzo[c]oxepine-4-carboxylate to give the alkyl 1-alkyl-1-aroyl-2-oxo-4,8b-dihydro-1H-3-oxabenzo[a]cyclopropa[c]cycloheptene-1a-carboxylate.