反应详情

Following a procedure analogous to (3b), the phenol from (3a) (270 mg, 0.97 mmol) was reacted with N,N′-dimethyl-O-t-butylisourea. Silica gel chromatography (ethyl acetate-hexane, 20:80) gave the t-butyl ether (50.2 mg, 15%) as a 1:1 mixture of two isomers. MS found: (M+H)+=334.