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