Acetic acid (2S,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[(3S,4S,4aS)-4-((S)-1,2-dihydroxy-ethyl)-8-oxo-4,4a,5,6-tetrahydro-3H,8H-pyrano[3,4-c]pyran-3-yloxy]-tetrahydro-pyran-3-yl ester   、                                                                                      
对甲苯磺酰氯                                                                                                                                                              在
                                                                                                                                                                                 
吡啶   、                                                                                                  4 A molecular sieve                                                                                                                                  作用下,
                                                                                                                                                                                        反应 36.0h,
                                                                                                                以135 mg的产率得到Acetic acid (2S,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-{(3S,4S,4aS)-4-[(S)-1-hydroxy-2-(toluene-4-sulfonyloxy)-ethyl]-8-oxo-4,4a,5,6-tetrahydro-3H,8H-pyrano[3,4-c]pyran-3-yloxy}-tetrahydro-pyran-3-yl ester