反应详情

To a solution of (S)-1,4-di(t-butoxycarbonyl)-2-(4′-methoxybiphen-4-yl)-piperazine (1.46 g, 3.12 mmol) in dichloromethane (8 mL) was added 4 N hydrogen chloride in ethyl acetate (8 mL) at room temperature. After stirring for 1 h, the precipitate was collected and dried in vacuo to afford (S)-2-(4′-methoxybiphen-4-yl) piperazine dihydrochloride (1.00 g, 94%) as white solid.

1. customthe precipitate was collected
2. customdried in vacuo