Tetrakis(dimethylamino)ethylene (TDAE) Mediated Addition of Heterocyclic Difluoromethyl Anions to Heteroaryl Aldehydes. A Facile Synthetic Method for New gem-Difluorinated Alcohols Derived from 4-Bromo-1-naphthylamine and 8-Quinolylamine
New heterocyclic-CF2CHOH-Ar derivatives, derived from N,N-dimethyl-4-bromo-2-difluoracetyl-1-naphthylamine and N,N-dimethyl-5-difluoroacetyl-8-quinolylamine, are easily obtained in moderate to good yields from the tetrakis(dimethylamino)ethylene (TDAE) mediated reduction of the corresponding - COCF2Cl starting materials in the presence of heteroaryl aldehydes.
Synthesis of novel fluorinated 4H-benzo[h]chromen-4-one and 4H-pyrano[3,2-h]quinolin-4-one derivatives
作者:Maurice Médebielle、Robert Keirouz、Etsuji Okada、Dai Shibata、William R. Dolbier
DOI:10.1016/j.tetlet.2007.11.146
日期:2008.1
New fluorinated 4H-benzo[h]chromen-4-one and 4H-pyrano[3,2-h]quinolin-4-one derivatives are obtained in moderate to good yields, through a one-pot aldolization–intramolecular SNAr process, from the tetrakis(dimethylamino)ethylene (TDAE) mediated reductive cleavage of two N,N-dimethylamino-bis-chlorodifluoroacetyl substrates in the presence of heteroaryl aldehydes.