6-hydroxy-2,5,7,8-tetramethyl-chroman-2-carboxylic acid 2-butyl-5-chloro-3-[2'-(2-trityl-2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-3H-imidazol-4-yl methyl ester 在
30% Pd/C 、
氢气 作用下,
20.0 ℃
、101.33 kPa
条件下,
反应 6.0h,
以39%的产率得到6-hydroxy-2,5,7,8-tetramethyl-chroman-2-carboxylic acid 2-butyl-3-[2'-(2H-tetrazol-5-yl)biphenyl-4-ylmethyl]-3H-imidazol-4-yl methyl ester