(2S,3R)-3-((2S,3R,4R,5R,6R)-4,5-Diacetoxy-6-acetoxymethyl-3-azido-tetrahydro-pyran-2-yloxy)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-butyric acid 2-(2-methoxy-ethoxy)-ethyl ester   、                                                                                      
硫代乙酸                                                                                                                                                                                                                                                                      反应 16.0h,
                                                                                                                以73%的产率得到(2S,3R)-3-((2S,3R,4R,5R,6R)-4,5-Diacetoxy-6-acetoxymethyl-3-acetylamino-tetrahydro-pyran-2-yloxy)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-butyric acid 2-(2-methoxy-ethoxy)-ethyl ester