Abstract
Abstract The efficiency of the 2-oxazoline system as a protecting group for the sterically hindered carboxyl function is demonstrated in the case of Grignard-reactions of certain organophosphorus compounds. Thereby, organophosphorus species with an o-carboxyphenyl group are easily accessible. Additionally, the enantiomer separation of an unsymmetrically substituted tertiary phosphine oxide with an o-carboxyphenyl group is described.
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