in N,N-dimethyl-formamide

1: With ethylenediaminetetraacetic acid trisodium salt; oxygen; Mn(CH3COO)2*4H2O; ascorbic acid powder in water Udenfriend reaction; pH=4; 2: With iron sulphate heptahydrate; ethylenediaminetetraacetic acid trisodium salt; oxygen in water T=45°C; Udenfriend reaction; 2 h;

1: ethanol 2: aq. Na2S2O4 / acetone 3: aq. HCl 4: (i) NaNH2, DMSO, (ii) /BRN= 605294/, (iii) tartaric acid, H2O, (iv) aq. NH3 View Scheme

1: ethanol 2: aq. Na2S2O4 / acetone 3: aq. HCl 4: (i) NaNH2, DMSO, (ii) /BRN= 605294/, (iii) tartaric acid, H2O, (iv) aq. NH3 View Scheme

1: aq. Na2S2O4 / acetone 2: aq. HCl 3: (i) NaNH2, DMSO, (ii) /BRN= 605294/, (iii) tartaric acid, H2O, (iv) aq. NH3 View Scheme

1: aq. HCl 2: (i) NaNH2, DMSO, (ii) /BRN= 605294/, (iii) tartaric acid, H2O, (iv) aq. NH3 View Scheme

(i) NaNH2, DMSO, (ii) /BRN= 605294/, (iii) tartaric acid, H2O, (iv) aq. NH3; Multistep reaction;