6-[(3-hydroxy-5-hydroxymethyl-2-methyl-pyridin-4-ylmethyl)-amino]hexanoic acid 、
二碳酸二叔丁酯 在
silica gel 、
methanol-dichloromethane 作用下,
以
1,4-二氧六环 、
甲醇 为溶剂,
反应 4.0h,
以to give 6-[tert-butoxycarbonyl-(3-hydroxy-5-hydroxymethyl-2-methyl-pyridin-4-ylmethyl)-amino]-hexanoic acid (41) (3.0 g, 49% yield)的产率得到6-[tert-butoxycarbonyl-(3-hydroxy-5-hydroxymethyl-2-methyl-pyridin-4-ylmethyl)-amino]-hexanoic acid