A convenient method for conversion of the Z-isomer to the E-isomer from a mixture containing both isomers of fulgides
摘要:
A new method for the conversion of the Z-isomer of unsymmetrical substituted bis-methylenesuccinic anhydrides, 'fulgides', to their geometrical E-isomers was achieved by heating the Z-isomer under reflux or a mixture of both isomers in pyridine to give the E-isomer in near quantitative yield. (C) 2002 Elsevier Science Ltd. All rights reserved.
Fulgides and photochromism. Synthesis of (E)- and (Z)-5-dicyanomethylene-4-dicyclopropylmethylene-3-[1-(2,5-dimethyl-3-furyl)ethylidene]tetrahydrofuran-2-one
作者:Zhiyuan Sun、Ramachandra S. Hosmane、Maher Tadros
DOI:10.1016/0040-4039(95)00632-m
日期:1995.5
The synthesis and photochemical property of (E+Z)-5-dicyanomethylene-4-dicyclopropylmethylene-3-[1-(2,5-dimethyl-3-furyl)ethylidene]tetrahydrofuran-2-one (3) are reported.
A convenient method for conversion of the Z-isomer to the E-isomer from a mixture containing both isomers of fulgides
作者:Abdullah Mohamed Asiri
DOI:10.1016/s0040-4039(02)01514-9
日期:2002.9
A new method for the conversion of the Z-isomer of unsymmetrical substituted bis-methylenesuccinic anhydrides, 'fulgides', to their geometrical E-isomers was achieved by heating the Z-isomer under reflux or a mixture of both isomers in pyridine to give the E-isomer in near quantitative yield. (C) 2002 Elsevier Science Ltd. All rights reserved.