反应详情

To a solution of 1M-lithium aluminium hydride in diethyl ether (40 ml) was added β,β-diphenylalanine hydrochloride (3.70 g, Example 1b) over a period of 1 h. The solution was heated at reflux for 1 h, cooled to room temperature and to the solution was cautiously added 2M-sodium hydroxide (40 ml). After filtering the solution through Celite, the residue was washed with ethyl acetate and the organic phase of the combined filtrates was washed with water, saturate brine and dried (MgSO4). The solid which formed on removal of the solvent in vacuo was washed with hexane to give 2-amino-3,3-diphenylpropan-1-ol 2.52 g, mp 107°-8° C. 1H NMR (360 MHz, CDCl3) δ7.36-7.14 (10H, m), 3.79 (1H, d, J=10.5 Hz), 3.6 (1H, m), 3.57 (1H, dd, J=10.7 Hz and 3.3 Hz), 3.31 (1H, dd, J=10.7 Hz and 6.7 Hz), m/z (CI+) 228 (M+H).

1. temperatureThe solution was heated
2. temperatureat reflux for 1 h
3. filtrationAfter filtering the solution through Celite
4. washthe residue was washed with ethyl acetate
5. washthe organic phase of the combined filtrates was washed with water
6. concentrationsaturate brine
7. dry with materialdried (MgSO4)
8. customThe solid which formed on removal of the solvent in vacuo
9. washwas washed with hexane