Synthesis of Z-5-Carboxymethylene-1,3-dioxolan-4-ones: A Better Way
摘要:
[GRAPHICS]The title compounds were prepared by a straightforward two-step procedure. Tartaric acid was first protected as either a bis(ketal) or a bis(acetal). This intermediate was then treated with potassium tert-butoxide at reduced temperature to effect a stereoselective elimination leading to the Z diastereomer of the alpha,beta-unsaturated acid. This protocol is useful for the laboratory-scale synthesis of these compounds but can also be scaled up to produce kilogram quantities of the material.
5-Acyloxydioxolanone als Prodrugs nichtsteroidaler Antirheumatika, 1. Mitt.
作者:Gerhard Schwenker、Karlheinz Stiefvater
DOI:10.1002/ardp.19913240510
日期:——
Die Derivatisierung verschiedener saurer nichtsteroidalerAntirheumatika zu 5‐Acyloxy‐1,3‐dioxolan‐4‐onen wird beschrieben. Die Synthese der Titelverbindungen gelingt durch Umsetzung von 5‐Brom‐1,3‐dioxolan‐4‐onen mit den Carbonsäuresalzen.
SCHWENKER, GERHARD;STIEFVATER, KARLHEINZ, ARCH. PHARM. , 324,(1991) N, C. 307-311
作者:SCHWENKER, GERHARD、STIEFVATER, KARLHEINZ
DOI:——
日期:——
Synthesis of <i>Z</i>-5-Carboxymethylene-1,3-dioxolan-4-ones: A Better Way
作者:Keming Zhu、James H. Simpson、Edward J. Delaney、William A. Nugent
DOI:10.1021/jo0700171
日期:2007.5.1
[GRAPHICS]The title compounds were prepared by a straightforward two-step procedure. Tartaric acid was first protected as either a bis(ketal) or a bis(acetal). This intermediate was then treated with potassium tert-butoxide at reduced temperature to effect a stereoselective elimination leading to the Z diastereomer of the alpha,beta-unsaturated acid. This protocol is useful for the laboratory-scale synthesis of these compounds but can also be scaled up to produce kilogram quantities of the material.