Synthesis of 4,5-Dihydroisoxazoles by Condensation of Primary Nitro Compounds with Alkenes by Using a Copper/Base Catalytic System
作者:Luca Cecchi、Francesco De Sarlo、Fabrizio Machetti
DOI:10.1002/chem.200800554
日期:2008.9.8
A new procedure for the synthesis of 4.5-dihydroisoxazoles by condensation of primarynitrocompounds with olefins by using a copper/base catalytic system is described. The catalytic effect of copper(II) salts is evidenced by comparison of the reaction rates. Thus, activatednitrocompounds react faster than with organic catalysis by tertiary amines, whereas nitroalkanes, unable to condense with dipolarophiles