Homoallylic substrates such as (E)-6-arylhex-3-enyl alcohols, N-tosylamides, and thiols undergo smooth cross-coupling with various aldehydes in the presence of 10 mol % Sc(OTf)3 and 30 mol % TsOH to afford the trans-fused hexahydro-1H-benzo[f]isochromenes, N-tosyloctahydrobenzo[f]isoquinolines, and hexahydro-1H-benzo[f]isothiochromenes, respectively. However, the cross-coupling of (Z)-olefins such
在10 mol%Sc(OTf)3和30 mol%TsOH的存在下,(E)-6-芳基己基-3-烯基醇,N-
甲苯磺酰胺和
硫醇等均烯丙基底物与各种醛的平滑交叉偶联反式稠合六氢ħ -苯并[ ˚F ] isochromenes,ñ -tosyloctahydrobenzo [ ˚F ]
异喹啉,和六氢ħ -苯并[ ˚F分别] isothiochromenes。然而,(Z)-烯烃如6-芳基己基-3-烯基醇,N-
甲苯磺酰胺和
硫醇与醛的交叉偶联提供了相应的六氢-1 H-苯并[ f]] isochromenes,Ñ -tosyloctahydrobenzo [ ˚F ]
异喹啉,和六氢ħ -苯并[ ˚F ]经由分子内Prins-,氮杂Prins-,和
硫杂普林斯/的Friedel-Crafts环化反应,分别完整顺式选择性isothiochromenes。尽管Prs环化在Sc(OTf)3的影响下顺利进行,但使用Sc