1: 60 percent / titanium trichloride, LiAlH4 / tetrahydrofuran; diethyl ether / 3 h / Ambient temperature 2: 7 percent Spectr. / O-mesitylenesulfonyl hydroxylamine / CH2Cl2 / 0.17 h / -95 °C View Scheme

1: 60 percent / LiAlH4, TiCl3 / tetrahydrofuran / 3 h / Ambient temperature 2: O-mesitylenesulfonyl hydroxylaminme (MSH) / CH2Cl2 / -95 °C View Scheme

1: 60 percent / titanium trichloride, LiAlH4 / tetrahydrofuran; diethyl ether / 3 h / Ambient temperature 2: 80 percent / O-mesitylenesulfonyl hydroxylamine / CH2Cl2 / 0.17 h / -95 °C View Scheme