三氟甲磺酸酐 、
(1S,3'R,4'S,5'R,6'R)-3',4',5'-triacetoxy-6'-(acetoxymethyl)-5-chloro-3',4',5',6'-tetrahydro-6-[(4-hydroxyphenyl)methyl]-spiro[isobenzofuran-1(3H),2'-[2H]pyran] 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以94%的产率得到(1S,3'R,4'S,5'R,6'R)-3',4',5'-triacetoxy-6'-(acetoxymethyl)-5-chloro-3',4',5',6'-tetrahydro-6-[(4-(trifluoromethanesulfonyloxy)phenyl)methyl]-spiro[isobenzofuran-1(3H),2'-[2H]pyran]