反应详情

Using a procedure similar to that described above in Example 58A, 13 g. of 3,4-dihydroxyphenyl tert-butylaminomethyl ketone hydrochloride was reacted with 8 g. of sodium methoxide in 200 ml. of N,N-dimethylformamide under an atmosphere of nitrogen and then 8 g. of m-toluyl chloride was added to produce 3-hydroxy-4-(m-toluyloxy)phenyl tert-butylaminomethyl ketone hydrochloride. This salt was converted to the free base which was treated with acetic acid to yield 11.5 g. of the acetate salt, m.p. 170°-175° C. By treating a slurry of this salt in 100 ml. of N,N-dimethylformamide with 40 g. of methanesulfonic acid there was obtained 10.6 g. of the corresponding methanesulfonate salt, m.p. >250° C. (uncorr.). This methanesulfonate (10 g.) was catalytically hydrogenated, using a procedure similar to that described above in Example 30B, to yield 5.4 g. of 3-hydroxy-4-(m-toluyloxy)-alpha-(tert-butylaminomethyl)benzyl alcohol methanesulfonate as a white crystalline solid which melted at 165°-168° C. (uncorr.).