Diastereoselective cis to trans desymmetrization of dimethyl succinates
摘要:
Meso-succinates, readily available by Diels-Alder cycloaddition of dimethyl maleate or maleic anhydride followed by esterification, can be isomerized quantitatively from the cis to the trans isomers in the presence of lithium alkoxides. The reaction performed with enantiopure chiral lithium alkoxides yields diastereomeric trans-succinates in good yield and selectivity. (C) 1999 Elsevier Science Ltd. All rights reserved.
Application of electron spin resonance spectroscopy to problems of structure and conformation. XXIV. Aliphatic semidiones. XIX. Polycyclic derivatives of cyclobutanesemidione
作者:Glen A. Russell、Philip R. Whittle、Robert G. Keske、George Holland、Carol Aubuchon
DOI:10.1021/ja00760a044
日期:1972.3
Bode, Chemische Berichte, 1937, vol. 70, p. 1167,1170