(E)-8-(tert-Butyl-dimethyl-silanyloxy)-2-triethylsilanyloxy-octa-1,3-diene 、
苯甲醛 在
tris(6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionato)ytterbium 作用下,
以
氯仿 为溶剂,
以61%的产率得到6-[4-(tert-Butyl-dimethyl-silanyloxy)-butyl]-2-phenyl-4-triethylsilanyloxy-3,6-dihydro-2H-pyran