2,6-anhydro-3,4,5,7-tetra-O-benzyl-1-deoxy-D-gluco-hept-1-enitol 、
(Z)-α-carbethoxy-N-methylnitrone 以
苯 为溶剂,
反应 24.0h,
以41.4%的产率得到ethyl (3R,5S,7R,8R,9S,10R)-8,9,10-tris(benzyloxy)-7-benzyloxymethyl-2-methyl-1,6-dioxa-2-azaspiro[4.5]decane-3-carboxylate