N-tert-butyl-2-ethoxy-2-oxoethanimine oxide   、                                                                                      
N-(1R,2R,3S,4R)-hex-5-ynoic acid (2,3,4,5-tetrahydroxy-1-vinyl-pentyl)-amide                                                                                                                                                                                              以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                    反应 336.0h,
                                                                                                                以82%的产率得到(1''R,2''R,3''S,4''R)-2-tert-butyl-5-(1''-(hex-5'-ynoyl)amino-2,'',3'',4'',5''-tetrahydroxy-pentyl)-isoxazolidine-3-carboxylic acid ethyl ester