tBu-缬氨酸叔丁酯   、                                                                                      
(2S,3S,4S,5R,6R)-6-[(2S,3S,4R,5R,6R)-3,5-dihydroxy-2-methyl-6-[2-(prop-2-enoylamino)ethoxy]oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
2-乙氧基-1-乙氧碳酰基-1,2-二氢喹啉                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                                                        以95%的产率得到(2S,3R)-2-({(2S,3S,4S,5R,6R)-6-[(2R,3R,4R,5S,6S)-2-(2-Acryloylamino-ethoxy)-3,5-dihydroxy-6-methyl-tetrahydro-pyran-4-yloxy]-3,4,5-trihydroxy-tetrahydro-pyran-2-carbonyl}-amino)-3-tert-butoxy-butyric acid tert-butyl ester