Vinylsulfone-modified carbohydrates: first general route to d-lividosamine (2-amino-2,3-dideoxy-d-glucose) and its new analogues
摘要:
A general route to D-lividosamine and its new analogues has been devised for the first time. The essence of the present synthetic route lies in the diastereoselective introduction of N-monoalkylated and N-dialkylated amines to C-2 carbons of methyl 2,3-dideoxy-3-C-phenylsulfonyl-alpha -D-hex-2-enopyranoside and methyl 2,3-dideoxy-3-C-phenylsulfonyl-P-D-hex-2-enopyranoside in equatorial configurations. The 2-amino-2,3-didcoxysugrs thus generated, are desulfonated reductively at C-3 sites to produce a known intermediate for the synthesis of D-lividosamine and several new 2-N-alkylamino- acid 2-N,N-dialkylamino-2,3-dideoxy analogues. (C) 2001 Elsevier Science Ltd. All rights reserved.