反应详情

Was prepared according to method A with the following variation: A solution of 4-bromochlorobenzene (1.15 g, 5.98 mmol) in THF (5 mL) was added drop-wise to a solution of n-BuLi (1.6 M in hexanes (4 mL, 6.4 mmol)) at −78° C. and stirred for 30 min. A solution of 9-oxo-3-aza-spiro[5.5]undecane-3-carboxylic acid tert-butyl ester (500 mg, 1.87 mmol) in THF (5 mL) was added. The mixture was stirred for 1 h. White solid Mp. 104.2-107.1° C.

1. customWas prepared
2. stirringThe mixture was stirred for 1 h