1-tert-Butyldimethylsilyloxy-3-pentyl-7,8,9,10-tetrahydrobenzo[c]chromen-6-one 在
silica gel 、 ethyl acetate heptane 作用下,
以
四氢呋喃 为溶剂,
以giving 24.5 g (81%) of (6aR*,10aS*)-1-tert-butyldimethylsilyloxy-3-pentyl-6a,7,8,9,10,10a-hexahydrobenzo[c]chromen-6-one as a colourless oil的产率得到(6aR*,10aS*)-1-tert-butyldimethylsilyloxy-3-pentyl-6a,7,8,9,10,10a-hexa-hydrobenzo[c]chromen-6-one