Arthrobacter sp. lipase immobilization for preparation of enantiopure masked β-amino alcohols
摘要:
Recent reports on immobilization of lipase from Arthrobacter sp. (ABL, MTCC 5125; IIIM isolate) on insoluble polymers have shown altered properties including stability and enantioselectivity. Present work demonstrates a facile method for the preparation of enantiopure beta-amino alcohols by modulation of ABL enzyme properties via immobilization on insoluble as well as soluble supports using entrapment/covalent binding techniques. Efficacies of immobilized ABL on insoluble supports prepared from tetraethylorthosilicate/aminopropyltriethoxy silane and soluble supports derived from copolymerization of N-vinyl pyrrolidone-allylglycidyl ether (ANP type)/N-vinyl pyrrolidone-glycidyl methacrylate ( GNP type) for kinetic resolution of masked beta-amino alcohols have been studied vis-a-vis free ABL enzyme/wet cell biomass. The immobilized lipase on different insoluble/soluble supports has shown 21 - 110 mg/g protein binding and 30 - 700 U/g activity for hydrolyzing tributyrin substrate. The findings have shown a significant enhancement in enantioselectivity (ee 99%) vis-a-vis wet cell biomass providing ee 70-90% for resolution of beta-amino alcohols. (c) 2008 Elsevier Ltd. All rights reserved.
An expedient chemo-enzymatic method for the synthesis of optically active masked 1,2-amino alcohols
作者:Pankaj Gupta、Subhash C. Taneja、Bhahwal A. Shah、Debaraj Mukherjee、Rajinder Parshad、Swapandeep S. Chimni、Ghulam N. Qazi
DOI:10.1016/j.tetasy.2008.08.004
日期:2008.8
of enantiopure masked 1,2-aminoalcohols (ee >99%) including their alkyl substituted analogues has been achieved by the regioselectiveringopening of epoxides using phthalimide, followed by highlyefficientkineticresolution under mild and environmentally friendly conditions. The addition of co-solvents during kineticresolution significantly improved the enantioselectivity with reduction in time