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 Tandem Three-Phase Reaction for Preparing Secondary Amines with Minimal Side Products
摘要:
A new method for the preparation of secondary amines has been reported. Complementary solution-phase and solid-phase synthesis highlight the process. Amines are obtained in good yields free from the usual byproducts of reductive amination. Secondary amines are unreactive, so overalkylation does not occur. The procedure can be used interchangeably for traditional or parallel synthesis settings.