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Arthrobacter sp.: a lipase of choice for the kinetic resolution of racemic arylazetidinone precursors of taxanoid side chains
Affiliation:1. Indian Institute of Integrative Medicine (CSIR), Jammu Tawi 180 001, India;2. Department of Chemistry, University of Jammu, Jammu Tawi 180 005, India
Abstract:The native strain of Arthrobacter sp. (MTCC 5125) bearing a lipase has been found to be the most effective in the kinetic resolution of racemic arylazetidinones for producing cis-(3R,4S)-3-acetoxy-1-(4-methoxyphenyl)-4-phenyl-2-azetidinone, cis-(3R,4S)-3-acetoxy-1-(4-methoxyphenyl)-4-(2-furanyl)-2-azetidinone, cis-(3R,4S)-3-acetoxy-1-(4-methoxyphenyl)-4-(2-thienyl)-2-azetidinone, and cis-3-acetoxy-4-(t-butyl)-2-azetidinone products. The resolved compounds, which were obtained in high enantiopurity are important intermediates of amino acid side chains of paclitaxel as well as a new generation of taxanoids. The use of co-solvents dramatically improved the resolution efficacy of the lipase.
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