1,4-Bis-[(4R,5R,6S)-5-(tert-butyl-diphenyl-silanyloxy)-4-dimethylamino-6-methyl-5,6-dihydro-4H-pyran-2-yl]-4-triethylsilanyloxy-cyclohexa-2,5-dienol 在
三氟化硼乙醚 作用下,
以
四氢呋喃 为溶剂,
以83%的产率得到(2S,3R,4R)-3-[tert-butyl(diphenyl)silyl]oxy-6-[3-[(2S,3R,4R)-3-[tert-butyl(diphenyl)silyl]oxy-4-(dimethylamino)-2-methyl-3,4-dihydro-2H-pyran-6-yl]-4-triethylsilyloxyphenyl]-N,N,2-trimethyl-3,4-dihydro-2H-pyran-4-amine