Lactic acid, configuration resolution

Fortunately, a host of methods is available for achieving this goal. They include resolution of a D,L-mixture [238] inversion of L-lactic acid derivatives (see Sections 1.2.1.2 and 1.2.2.2) asymmetric reduction of pyruvates catalytically [239], enzymatically [240], or with chiral boranes [241] and diazotization of D-alanine derivatives, which proceeds with net retention of configuration [242,243]. In addition, D-lactic acid can be obtained by the fermentation of glucose with Lactobacillus leichmannii in the presence of calcium carbonate [244],... 

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