3-{(2-Methoxycarbonyl-ethyl)-[(2R,3R,4S,5R,6R)-3,4,5-triacetoxy-6-(2-amino-ethoxy)-tetrahydro-pyran-2-ylmethyl]-amino}-propionic acid methyl ester 、
3-[[(2R,3S,4S,5R,6R)-6-(2-tert-Butoxycarbonylamino-ethoxy)-3,4,5-trihydroxy-tetrahydro-pyran-2-ylmethyl]-(2-carboxy-ethyl)-amino]-propionic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
反应 12.0h,
以79%的产率得到methyl 3-[(3-methoxy-3-oxopropyl)-[[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-[2-[3-[[3-oxo-3-[2-[(2R,3R,4S,5R,6R)-3,4,5-triacetyloxy-6-[[bis(3-methoxy-3-oxopropyl)amino]methyl]oxan-2-yl]oxyethylamino]propyl]-[[(2R,3S,4S,5R,6R)-3,4,5-trihydroxy-6-[2-[(2-methylpropan-2-yl)oxycarbonylamino]ethoxy]oxan-2-yl]methyl]amino]propanoylamino]ethoxy]oxan-2-yl]methyl]amino]propanoate