Fmoc-O-<3,4,6-tri-O-benzyl-2-O-(2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl)-α-D-mannopyranosyl>-L-threonine benzyl ester 在
吗啉 作用下,
反应 0.5h,
以92%的产率得到(2S,3R)-2-Amino-3-[(2S,3S,4S,5R,6R)-4,5-bis-benzyloxy-6-benzyloxymethyl-3-((2R,3S,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yloxy]-butyric acid benzyl ester