[(1S,11S,12S,14R,15R,20S)-1,11,15,18,18-pentamethyl-5-oxo-7-pyridin-3-yl-6,10,17,19-tetraoxapentacyclo[12.8.0.02,11.04,9.015,20]docosa-2,4(9),7-trien-12-yl] pentanoate 在
溶剂黄146 作用下,
反应 4.0h,
以82%的产率得到Pentanoic acid (3S,4R,4aR,6S,6aS,12R,12bS)-3,12-dihydroxy-4-hydroxymethyl-4,6a,12b-trimethyl-11-oxo-9-pyridin-3-yl-1,3,4,4a,5,6,6a,12,12a,12b-decahydro-2H,11H-7,10-dioxa-benzo[a]anthracen-6-yl ester