Method for the Production of 1,3-Dioxolane-2-Ones and Carboxylic Acid Esters by Means of Transacylation in Basic Reaction Conditions
申请人:Brandenburg Joerg
公开号:US20100305146A1
公开(公告)日:2010-12-02
The invention relates to a method for producing 1,3-dioxolane-2-ones of general formula (3) in basic reaction conditions by reesterifying the respective ester of general formula (1) in which R1 to R5 have the meanings indicated in the claims and the description. The invention further relates to a method for producing 2-hydroxy carboxylic acid esters of general formula (5) with or without isolation of the intermediate in the form of a derivative of the 1,3-dioxolane-2-one of general formula (3) in basic reaction conditions by reesterifying the respective ester of general formula (1) in which R1, R2, and R6 have the meanings indicated in the claims and the description. The method according to the invention allows the reaction to take place in very gentle basic conditions, causing fewer secondary reactions and providing a greater yield than reactions in highly polar aprotic solvents. Acid-sensitive and/or temperature-sensitive compounds can be synthesized.
本发明涉及一种在碱性反应条件下通过重新酯化具有通式(1)中R1到R5所示含义的相应酯来生产通式(3)的1,3-二氧兰-2-酮的方法。本发明还涉及一种在碱性反应条件下通过重新酯化具有通式(1)中R1、R2和R6所示含义的相应酯来生产通式(5)的2-羟基羧酸酯的方法,可以有或没有通过以通式(3)的衍生物形式分离中间体。本发明的方法允许在非常温和的碱性条件下进行反应,导致较少的次级反应并提供比在高极性无极溶剂中反应更高的收率。酸敏感和/或温度敏感的化合物可以合成。