反应详情

温度

100 °C

A solution of 1-methyl-4-phenyl-4-piperidinol (60.0 g, 0.314 moles, described in Example 1) in concentrated hydrochloric acid (180 ml, 2.16 moles) is heated with stirring at 100° C. for 4 hours. The resulting brown solution is evaporated to dryness and the buff residue is crystallized from isopropanol to give the title compound as the hydrochloride salt, mp 250°-252° C. (S. M. Elvain and J. C. Safranski, Jr., supra, reported mp 248°-250° C.

1. customThe resulting brown solution is evaporated to dryness
2. customthe buff residue is crystallized from isopropanol