A versatile and new highly stereoselective approach to the synthesis of l-glycero-d-manno-heptopyranosides
作者:G.J.P.H Boons、G.A van der Marel、J.H van Boom
DOI:10.1016/s0040-4039(00)95167-0
日期:1989.1
The reaction of (phenyldimethyl)silylmethylmagnesium chloride with benzyl 2,3,4-tri-O-benzyl-α-D-manno-hexodialdo-1,5-pyranoside affords the corresponding L-glycero-D-manno-addition product having at C-7 the phenyldimethylsilyl (PDMSi) group. The latter silanyl compound survived benzylation as well as glycosylation at OH-6, and the PDMSi group could be unmasked with overall retention of configuration
(苯基二甲基)甲硅烷基甲基镁氯化物与苄基2,3,4-三-O-苄基-α-D-甘露聚糖-己二醛-1,5-吡喃糖苷的反应得到相应的L-甘油-D-甘露聚糖-加成产物,其具有C-7为苯基二甲基甲硅烷基(PDMSi)。后者的甲硅烷基化合物在OH-6处的苄基化和糖基化作用下均能幸存下来,并且PDMSi基团可以被掩盖,从而保持整体构型,从而获得游离羟基。