Access to 1H-indazoles, 1H-benzoindazoles and 1H-azaindazoles from (het)aryl azides: a one-pot Staudinger-aza-Wittig reaction leading to N–N bond formation?
Synthesis of substituted azaoxindoles for the preparation of aza-tenidap analogs
作者:Ralph R. Robinson、Kathleen M. Donahue、Paul S. Son、Steven D. Wagy
DOI:10.1002/jhet.5570330213
日期:1996.3
on the aromatic nucleus is outlined. These compounds were required for the preparation of aza-analogs of the anti-inflammatory oxindole tenidap. Two methods of synthesis were used, the first involving the addition of malonate to 2-chloro-3-nitropyridine derivatives followed by nitro group reduction and one-pot cyclization/hydrolysis/decarboxylation. The second method, utilizing the vicarious nucleophilic