2,2,6,6-tetramethyl-1-phenyldiazenyl-piperidin-4-ol 、
苯甲酰氯 在
4-二甲氨基吡啶 甲醇 作用下,
以
吡啶 、 ice water 为溶剂,
反应 4.0h,
以to afford 4.43 g of benzoic acid 2,2,6,6-tetramethyl-1-phenyldiazenyl-piperidin-4-yl ester as an off-white solid, m.p. 89-91° C.的产率得到benzoic acid 2,2,6,6-tetramethyl-1-phenyldiazenyl-piperidin-4-yl ester