Patent ID: 6646152
Filing Date: 2003-11-11
Classification: C07C

Abstract:
A process for preparing 2-hydroxycarboxylic esters of the formula I in whichR1 and R2 independently of one another are C1-C20-alkyl, C3-C8-cycloalkyl, C2-C20-alkenyl, C2-C20-alkynyl, C6-C10-aryl, C7-C14-aralkyl or C7-C20-alkylaryl, or R1 and R2 together with the carbon atom to which they are attached form a 5- to 8-membered ring; R3 is C1-C20-alkyl, C2-C20-alkenyl or C2-C20-alkynyl; R4 is C1-C20-alkyl, C3-C8-cycloalkyl, C2-C20-alkenyl, C2-C20-alkynyl, C6-C10-aryl, C7-C14-aralkyl or C7-C20-alkylaryl; which comprises reacting a glycidyl ester of the formula II in which R1, R2 and R4 are as defined above with an organoaluminum reagent of the formula III in which R3 is as defined above, X in each case independently have the meanings given for R3 or are halogen or C1-C4-alkoxy and n is from 0 to 10.