Highly anti-selective dihydroxylation of 1,2-dialkyl substituted (Z)-allylic amines: stereoselective synthesis of a D-ribo-phytosphingosine derivative

摘要

Protection of 1,2-dialkyl substituted (Z)-allylic amines with an N,N-diBoc group resulted in an opposite stereoselectivity in the OsO4-catalyzed dihydroxylation reactions to that of N-Boc-(Z)-allylic amines.A higher anti selectivity (>10:1) was shown in CH2Cl2.An efficient stereoselective synthesis of a tetraacetyl derivative of D-ribo-phytosphingosine was reported using the N,N-diBoc-controlled dihydroxylation from Garner's aldehyde.