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US4937379A Carboxylic acid synthesis process 失效
羧酸合成工艺

Carboxylic acid synthesis process
摘要:
A process is described for preparing alpha-arylalkanoic acids, which comprises preparing and subsequently rearranging ketals of formula ##STR1## (in which Ar, R, R.sub.1, R.sub.2 and R.sub.4 have the meanings given in the description).The ketals of formula II are prepared from the corresponding alpha-hydroxyketals.The rearrangement reaction is conducted under mild conditions.
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