Stannous Chloride → Methyl 5-amino-4'-methylbiphenyl-3-carboxylate

Participants

Reaction Steps

To a solution of 4′-Methyl-5-nitro-biphenyl-3-carboxylic acid methyl ester (10.00 g, 36.9 mmol) in methanol was added SnCl2 (27.98 g, 147.6 mmol) at room temperature. The reaction mixture was refluxed for 3 hours, then cooled. Solvent was removed in vacuo and the residue was dissolved in H2O, then basified by addition of Na2CO3 to pH=9. The mixture was extracted by CH2Cl2, and the organic phase was washed with water followed by brine, and dried over Na2SO4. The solvent was removed under vacuum to give 5-Amino-4′-methyl-biphenyl-3-carboxylic acid methyl ester (8.48 g, 95%) as yellow oil. MS (M+H)=242.

Provenance & Evidence