Metal-Free Entry to Phosphonylated Isoindoles by a Cascade of 5-exo-dig Cyclization, a [1,3]-Alkyl Shift, and Aromatization under Microwave Heating
摘要:
When o-ethynylbenzyl alpha-aminophosphonates are heated under microwave conditions, a rearrangement occurs which results in the formation of phosphonylated isoindoles. The rearrangement consists of a 5-exo-dig cyclization followed by a [1,3]-alkyl shift and finally aromatization.
A novel, chemically robust, amine releasing linker
作者:Corinne Kay、Peter John Murray、Lisa Sandow、Andrew B. Holmes
DOI:10.1016/s0040-4039(97)01627-4
日期:1997.9
A polymer supported sulfonamide 1, based on an amine protective group, has been developed as a novel linker for solid phase organic synthesis. The linker permits the immobilisation of alcohol substrates, and releases N-protected amines under mild nucleophilic cleavage conditions. (C) 1997 Elsevier Science Ltd.
Metal-Free Entry to Phosphonylated Isoindoles by a Cascade of 5-<i>exo</i>-dig Cyclization, a [1,3]-Alkyl Shift, and Aromatization under Microwave Heating
作者:Nicolai Dieltiens、Christian V. Stevens
DOI:10.1021/ol062817o
日期:2007.2.1
When o-ethynylbenzyl alpha-aminophosphonates are heated under microwave conditions, a rearrangement occurs which results in the formation of phosphonylated isoindoles. The rearrangement consists of a 5-exo-dig cyclization followed by a [1,3]-alkyl shift and finally aromatization.
Directed Copper-Catalyzed Tandem Radical Cyclization Reaction of Alkyl Bromides and Unactivated Olefins
The free radicalcyclization reaction is a promising strategy for ring framework formation. Herein, we report a copper-catalyzed tandem radicalcyclization strategy for preparing substituted lactam derivatives. This reaction proceeds through a radical coupling approach, which not only allows a wide range of alkenes but also is quite compatible with the primary, secondary, and tertiary radicals. In addition