Synthesis of <scp>l</scp>-<i>altro</i>-1-Deoxynojirimycin, <scp>d</scp>-<i>allo-</i>1-Deoxynojirimycin, and <scp>d</scp>-<i>galacto-</i>1-Deoxynojirimycin from a Single Chiral Cyanohydrin
作者:Adrianus M. C. H. van den Nieuwendijk、Mark Ruben、Sander E. Engelsma、Martijn D. P. Risseeuw、Richard J. B. H. N. van den Berg、Rolf G. Boot、Johannes M. Aerts、Johannes Brussee、Gijs A. van der Marel、Herman S. Overkleeft
DOI:10.1021/ol101556k
日期:2010.9.3
The chemoenzymatic synthesis of three 1-deoxynojirimycin-type iminosugars is reported. Key steps in the synthetic scheme include a Dibal reduction−transimination−sodium borohydride reduction cascade of reactions on an enantiomerically pure cyanohydrin, itself prepared employing almond hydroxynitrile lyase (paHNL) as the common precursor. Ensuing ring-closing metathesis and Upjohn dihydroxylation afford