Rearrangements of Some New Hydroxamic Acids Related to Heterocyclic Acids And T
Rearrangements of Some New Hydroxamic Acids Related to Heterocyclic Acids And T
Charles D Hurd
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When the solution of sodium hydroxide is warmed, rearrange- ment takes place. When the ester was heated a little above its melting point, the odor of isocyanate became noticeable at once. Analysis. Subs.. 0. 5417: N, 20. 6 cc. (over 40% KOH, at 26 and 740. 1 mm. ) Calc. For C;iH 17 O, N:N, 4. 22. Found: 4. 13. Potassium Salt. (CeHs^CH. CO. NK. O. CO. CftHs. First Method. Alcoholic po- tassium hydroxide was prepared of such a strength that 1 cc. = 0. 113 g. Of KOH. One cc. Of this reagent was ad...ded to a solution of 0. 67 g. Of the benzoyl ester in a mixture of 15 cc. Of absolute alcohol and 10 cc. Of dry ether, previously cooled to 15. There was no precipitation when a sample of the solution was diluted largely with ether, or with petroleum ether. Part of the solution was treated with silver nitrate to form the silver salt (see p. 2435). The rest was evaporated in vacua over cone, sulfuric acid. For convenience, the residue left after evaporation of the solution will be called "R. " This residue (R) was shown to consist of a mixture of the desired potassium salt, together with diphenyl-methyl isocyanate, diphenyl-methyl urethane, and potassium benzoate.
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