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US4707549A Preparation of esters of optically active 2-arylalkanoic acids 失效
光学活性2-芳基链烷酸酯的制备

Preparation of esters of optically active 2-arylalkanoic acids
摘要:
Esters of optically active 2-arylalkanoic acids I ##STR1## where Ar is an isocyclic or heterocyclic aryl radical and R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 -alkyl, are prepared by subjecting an optically active ester II ##STR2## where X is Cl, Br or --O--SO.sub.2 --Y and Y is Cl or a hydrocarbon radical, to a Friedel-Crafts reaction with an aromatic compound ArH (III).
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