Regioselectivity in the 1,3-dipolar cycloaddition of nitrile oxides to 3,3-methylene-5,5-dimethyl-2-pyrrolidinone
摘要:
Nitrile oxides add regioselectively to the carbon-carbon double bond of 3,3-methylene-5,5-dimethyl-2-pyrrolidinone (1), giving exclusively spiro-isoxazolines: 3-aryl-6-oxo-8,8-dimethyl-1-oxa-2,7-diazaspiro[4,4]non-2-enes 3 a-1. The regiochemistry of the 1,3-dipolar cycloaddition to 1 seems to be controlled by the steric effect of the methyl groups at the ring junction and by frontier orbital interactions.
Regioselectivity in the 1,3-dipolar cycloaddition of nitrile oxides to 3,3-methylene-5,5-dimethyl-2-pyrrolidinone
作者:Peter Oravec、L. Fišera、Peter Ertl、Daniel Végh
DOI:10.1007/bf00815920
日期:1991.10
Nitrile oxides add regioselectively to the carbon-carbon double bond of 3,3-methylene-5,5-dimethyl-2-pyrrolidinone (1), giving exclusively spiro-isoxazolines: 3-aryl-6-oxo-8,8-dimethyl-1-oxa-2,7-diazaspiro[4,4]non-2-enes 3 a-1. The regiochemistry of the 1,3-dipolar cycloaddition to 1 seems to be controlled by the steric effect of the methyl groups at the ring junction and by frontier orbital interactions.