Acetic acid (2R,3R,4S,5R,6R)-4,5-bis-benzyloxy-2-[((2S,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-carbonyl)-amino]-6-trityloxymethyl-tetrahydro-pyran-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
对甲苯磺酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以94%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-bis-benzyloxy-6-hydroxymethyl-2-[((2S,3S,4S,5R,6S)-3,4,5-tris-benzyloxy-6-methoxy-tetrahydro-pyran-2-carbonyl)-amino]-tetrahydro-pyran-3-yl ester