松甾酮A 、
1-[[7-(二乙基氨基)-2-氧代-2H-1-苯并吡喃-3-基]羰基]-1H-咪唑 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
乙腈 为溶剂,
反应 1.5h,
以58%的产率得到[(2S,3R,5R,9R,10R,13R,14S,17S)-2-[7-(diethylamino)-2-oxochromene-3-carbonyl]oxy-17-[(2R,3R)-2,3-dihydroxy-6-methylheptan-2-yl]-14-hydroxy-10,13-dimethyl-6-oxo-2,3,4,5,9,11,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-yl] 7-(diethylamino)-2-oxochromene-3-carboxylate