(4-cyano-phenyl)-(5-hydroxy-4-hydroxymethyl-6-methyl-pyridin-3-ylmethyl)-carbamic acid tert-butyl ester 、
对氰基溴化苄 以gave [5-(4-cyano-benzyloxy)-4-hydroxymethyl-6-methyl-pyridin-3-ylmethyl]-(4-cyano-phenyl)-carbamic acid tert-butyl ester (124) (126.0 g, 70% yield) as a colorless solid的产率得到[5-(4-cyano-benzyloxy)-4-hydroxymethyl-6-methyl-pyridin-3-ylmethyl]-(4-cyano-phenyl)-carbamic acid tert-butyl ester