TITLE:
Chemoenzymatic Synthesis of an Enantiomerically Enriched Bicyclic Carbocycle Using Candida parapsilosis ATCC 7330 Mediated Enantioselective Hydrolysis
AUTHORS:
Thangavelu Saravanan, Anju Chadha, Tarur Konikkaledom Dinesh, Namasivayam Palani, Sengottuvelan Balasubramanian
KEYWORDS:
Chemoenzymatic Synthesis, Enantioselective Hydrolysis, Candida parapsilosis ATCC 7330, Hydrolases, Bicyclic Carbocycle
JOURNAL NAME:
International Journal of Organic Chemistry,
Vol.5 No.4,
December
24,
2015
ABSTRACT: Enantiomerically enriched (R)-1-(2-bromocycloalkenyl)-3-buten-1-ol and its derivatives were obtained via enantioselective hydrolysis [resolution] with good enantioselectivities (E = 31 to >500) using Candida parapsilosis ATCC 7330. The various reaction parameters were optimized for enantioselective hydrolysis to achieve high enantiomeric excess (ee) and conversions. Among the substrates tested, (RS)-1-(2-bromocyclohex-1-en-1-yl) but-3-yn-1-yl acetate was hydrolysed by the biocatalyst in 12 h to the corresponding (R)-alcohol in 49% conversion and >99 ee. The optically pure allylic alcohol thus obtained was used as a chiral starting material for the synthesis of an enantiomerically enriched bicyclic alcohol effectively establishing achemoenzymatic route.