Synthesis of enantiomerically enriched (R)- and (S)-benzofuranyl- and benzo[b]thiophenyl-1,2-ethanediols via enantiopure cyanohydrins as intermediates
摘要:
The chemoenzymatic synthesis of highly enantiopure (R)- and (S)-benzofuranyl- and benzo[b]thio-phenyl-cyanohydrins and their chemical transformation into the corresponding heteroaryl-1,2-ethanediols is described. (C) 2010 Elsevier Ltd. All rights reserved.
Sequential enzymatic procedure for the preparation of enantiomerically pure 2-heteroaryl-2-hydroxyacetic acids
摘要:
Starting from the racemic 2-benzofuranyl- and 2-benzo[b]thiophenyl-2-hydroxyacetic acid ethyl esters as substrates, a general method was developed for the efficient synthesis of the corresponding highly enantiomerically enriched (ee up to 99%) (R)- and (S)-2-heteroaryl-2-hydroxyacetic acids. (C) 2012 Elsevier Ltd. All rights reserved.