3,4-二氢-2H-吡喃 、
benzyl 4-[[(5,5-dimethyl-5,6,7,8-tetrahydro-8-hydroxy-naphthalen-2-yl)carbonyl]oxy]benzoate 在
4-甲基苯磺酸吡啶 作用下,
生成 benzyl 4-[5,6,7,8-tetrahydro-8(S or R)-(2'(S or R)-tetrahydropyranoxy)-5,5-dimethyl-2-naphthoyloxy]benzoate 、 benzyl 4-[5,6,7,8-tetrahydro-8(S or R)-(2'(S or R)-tetrahydropyranoxy)-5,5-dimethyl-2-naphthoyloxy]benzoate