Benzoic acid (3aS,4R,6S,7R,7aS)-6-(1,3-dioxo-1,3-dihydro-isoindol-2-yloxy)-4-methyl-2-thioxo-tetrahydro-[1,3]dioxolo[4,5-c]pyran-7-yl ester 在
三甲氧基磷 作用下,
反应 4.5h,
以87%的产率得到Benzoic acid (2S,3R,6R)-2-(1,3-dioxo-1,3-dihydro-isoindol-2-yloxy)-6-methyl-3,6-dihydro-2H-pyran-3-yl ester