Tert-butyl 2-(acetoxymethyl)-4-oxopiperidine-1-carboxylate 、
O-(2-chloro-4-bromophenyl)hydroxylamine hydrochloride 在
SiO2 、 hexanes ethyl acetate 作用下,
以afforded tert-butyl 3-(acetoxymethyl)-8-bromo-6-chloro-1,4,4a,9b-tetrahydrobenzofuro[3,2-c]pyridine-2(3H)-carboxylate (203 mg, 8%) as a colorless oil的产率得到tert-butyl 3-(acetoxymethyl)-8-bromo-6-chloro-1,4,4a,9b-tetrahydrobenzofuro[3,2-c]pyridine-2(3H)-carboxylate