Biocatalytic asymmetric formation of tetrahydro-β-carbolines
作者:Peter Bernhardt、Aimee R. Usera、Sarah E. O’Connor
DOI:10.1016/j.tetlet.2010.06.075
日期:2010.8
Strictosidine synthase triggers the formation of strictosidine from tryptamine and secologanin, thereby generating a carbon-catbon bond and a new stereogenic center Strictosidine contains a tetrahydro-beta-carboline moiety an important N-heterocyclic framework found in a range of natural products and synthetic pharmaceuticals Stereoselective methods to produce tetrahydro-B-carboline enantiomers are greatly valued We report that strictosidine synthase from Ophiorrhiza pumila utilizes a range of simple achiral aldehydes and substituted tryptamines to form highly enantioenriched (ee >98%) tetrahydro-beta-carbolines via a Pictet-Spengler reaction This is the first example of aldehyde substrate promiscuity in the strictosidine synthase family of enzymes and represents a first step toward developing a general biocatalytic strategy to access chiral tetrahydro-beta-carbolines (C) 2010 Elsevier Ltd All rights reserved