乙酸酐 、
(2R,3R)-6-[2-[(4R,5R)-5-[(1R)-1-[(4S,5R)-2,2-dimethyl-4,5-bis(phenylmethoxymethyl)-1,3-dioxolan-4-yl]-1-hydroxy-2-phenylmethoxyethyl]-2,2-dimethyl-1,3-dioxolan-4-yl]-1,3-dithian-2-yl]-2-methyl-1-phenylhexan-3-ol 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
反应 26.0h,
以86%的产率得到(4'R,5'R,1''R,2''R,3''R,4''S,5''R)-2-[4'-acetoxy-5'-methyl-6'-phenylhex-1'-yl]-2-[6''-benzyloxy-3'',4''-bis(benzyloxymethyl)-1'',2'',4'',5''-bis(di-O-isopropylidene)-3''-hydroxyhex-1''-yl][1,3]dithiane