STOBBE CONDENSATION INVOLVING DIETHYL DIGLYCOLLATE WITH FURAN 2-ALDEHYDE AND THIOPHENE-2-ALDEHYDE SYNTHESIS OF CYCLOPENTENO-FURAN AND CYCLOPENTENO- THIOPHENE DERIVATIVES

Authors : Eı ENAYAT

Pages : 0-0

Doi:10.1501/Commub_0000000243

View : 39 | Download : 6

Publication Date : 1985-01-01

Article Type : Research Paper

Abstract :Diethyl diglycollate condenses with furan -2-aldehyde and thiophene-2- aldehyde in pre¬sence of sodium hydride to give predominantly the insert ignore into journalissuearticles values(Z);-half ester insert ignore into journalissuearticles values(la, b); together with small amo- unts of the insert ignore into journalissuearticles values(E);-half ester insert ignore into journalissuearticles values(2a, b);. The structure of the insert ignore into journalissuearticles values(E);-half esters was based on their cycliza- tion to cyclopenteno-furan and cyclopentenothiophene derivatives insert ignore into journalissuearticles values(5a, b); respectively, as well as on spectroscopic evidence. The ratio of isomers has been interpreted in terms of the relative ease of formaticn of the S-lactone intermediates. Diethyl diglycollate condenses with furan-2-aldehyde and thiophene -2-aldehyde in presence of sodium hydride to give predominantly the insert ignore into journalissuearticles values(Z); half ester insert ignore into journalissuearticles values(la, b); together with small amounts of the insert ignore into journalissuearticles values(E);-half ester insert ignore into journalissuearticles values(2a, b);. The structure of the insert ignore into journalissuearticles values(E);-half esters was based on their cycliza- tion to cyclopenteno-furan and cyclopentenothiophene derivatives insert ignore into journalissuearticles values(5a, b); respectively, as well as on spectroscopic evidence.
Keywords : STOBBE CONDENSATION, INVOLVING DIETHYL, DIGLYCOLLATE

ORIGINAL ARTICLE URL