Dynamic Enzymatic Kinetic Resolution of Methyl 2,3-Dihydro-1<i>H</i>-indene-1-carboxylate
作者:Jörg Pietruszka、Robert Christian Simon、Fabian Kruska、Manfred Braun
DOI:10.1002/ejoc.200901025
日期:2009.12
A new reaction setup for kineticenzymaticresolution was established and is demonstrated for the case of the hydrolase-catalysed conversion of methyl2,3-dihydro-1H-indene-1-carboxylate (1) in conjunction with a base-catalysed racemisation. The system allows controlled racemisation, resulting in efficient dynamickineticresolution (DKR) of the title compound. Short reaction times and high enantioselectivities
The (R)-configuration, attributed to (+)-indane-1-carboxylicacid ((+)-1) by Fredga [1], is unequivocally confirmed (Scheme 1). Configurational doubts, raised by an erroneous ORD. curve of (−)-1-methylindane ((−)-4) published by Brewster & Buta [2], are unfounded (cf. the following paper of Brewster[3] and the corrections in (4)). This was further verified by preparing deuteriated 1-methylindanes starting