New Compounds 343 distilled to dryness under a vacuum.The residue was dissolved in 1500 cc. of water and treated with 50 g. of Norite at the boiling point. The filtrate was carefully acidified with glacial acetic acid. The 2-mercaptopyridine formed in bright yellow crystals which were collected, after chilling to 5 °, and washed with 2 liters of ice water. The dry product weighed about 400 g. and melted at 121-124°.A further 67-77 g. (m. p. 125-128°) was obtained by extraction of the filtrate and washings by chloroform, removing the latter by distillation and crystallizing the residue from benzene. The total yield was 461-483 >g. (83-87%).
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