Arene mono- and disulfonyl chlorides have been easily synthesized starting from the corresponding anilines via aqueous oxidative chlorination of S-aryl O-ethyl dithiocarbonates intermediates, aryl methyl sulfides, or from arenethiols.
Palladium-Catalyzed Domino Ring-Opening/Carboxamidation Reactions of <i>N</i>-Tosyl Aziridines and 2-Iodothiophenols: A Facile and Efficient Approach to 1,4-Benzothiazepin-5-ones
作者:Fanlong Zeng、Howard Alper
DOI:10.1021/ol102394h
日期:2010.12.3
A novel and efficientdomino procedure has been developed for the synthesis of 1,4-benzothiazepin-5-ones from simple and readily accessible N-tosyl aziridines and o-iodothiophenols. This process involves aziridines ring-opening with o-iodothiophenols, followed by palladium-catalyzed intramolecular carboxamidation. The scope and limitation of this transformation have been investigated in detail by using
Regioselective Carbonylative Heteroannulation of <i>o</i>-Iodothiophenols with Allenes and Carbon Monoxide Catalyzed by a Palladium Complex: A Novel and Efficient Access to Thiochroman-4-one Derivatives
作者:Wen-Jing Xiao、Howard Alper
DOI:10.1021/jo9913098
日期:1999.12.1
The palladium-catalyzed carbonylative ring-forming reactions of 2-iodothiophenol, and the corresponding substituted derivatives, with allenes and carbon monoxide are described. The reactions afford thiochroman-4-ones in good to excellent isolated yields with quite high regioselectivity. The catalytic heteroannulation may involve regioselective addition of the sulfur moiety of the reactants on the more positive end of the allene, arylpalladium formation, CO insertion, subsequent intramolecular cyclization, and then reductive elimination. The regioselectivity is probably governed by electronic effects.
ISSLEIB K.; VOLLMER R., Z. CHEM., 1978, 18, NO 12, 451-452