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.