The product obtained in a reaction of 3-methyl-4-nitro-5-styrylisoxazole (1) has been shown to be a diastereomeric mixture of two cyclobutyl dimers by NMR. A combination of1H,13C spectra including DEFT, ASIS, 2D COSY and nOe techniques has established that centrosymmetric cyclobutane (7) and the isomer (8) with plane of symmetry are in 2:1 proportion.
Journal of Chemical Sciences
Volume 135, 2023 All articles Continuous Article Publishing mode
