Add time:09/25/2019 Source:sciencedirect.com
Here we studied the homologation of leucic and phenyl lactic acid via Wolff-rearrangement of their diazoketones to the corresponding β-hydroxy acids. This reaction requires distinct conditions to that of their amino acid analogues. The choice of the Oα-substituent can selectively direct the reaction to α-unsubstituted β-hydroxy carboxamides or (E)-α,β-unsaturated carboxamides and offers a new route from α-hydroxy acids to such compounds.
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