反应详情

Phosgene (12 ml, 1M in toluene) was added to a solution of the subtitle product of step i) in DCM (20 ml) and DMF (2.5 ml) and stirred for 3 h before concentrating in vacuo to afford the subtitle compound as an oil that was used directly in the next step. 1H NMR δ(CD3OD) 3.30 (2H, m), 2.80 (2H, m) and 2.31 (6H, s).

1. concentrationbefore concentrating in vacuo