(2'R,5'R,7'R)-5-(2'-methyl-1',6'-dioxaspiro[4,5]dec-7'-yl)-pentanal 、 (4,6-Dimethoxy-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-phosphonic acid dimethyl ester 在
sodium hydride 作用下,
以
四氢呋喃 为溶剂,
反应 24.0h,
生成 (2''R,5''R,7''R)-5,7-dimethoxy-3-[5'-(2''-methyl-1'',6''-dioxaspiro[4,5]dec-7''-yl)pentylidene]isobenzofuran-1-one 、 (2''R,5''R,7''R)-5,7-dimethoxy-3-[5'-(2''-methyl-1'',6''-dioxaspiro[4,5]dec-7''-yl)pentylidene]isobenzofuran-1-one