P hydrazones

Aldehydes and ketones may be converted into the corresponding primary amines by reduction of their oximes or hydrazones (p. 93). A method of more limited application, known as the Leuckart Reaction, consists of heating the carbonyl compound with ammonium formate, whereby the formyLamino derivative is formed, and can be readily hydrolysed by acids to the amine. Thus acetophenone gives the i-phenylethylformamide, which without isolation can be hydrolysed to i-phenylethylamine. [Pg.223]

Ionization. The pKa at 25° in w is 3.60, 50% aq et ale 4.11, et ale 7.5, and me ale 7.2 (Ref 17) Reactions. It reacts with benzenediazonium chloride to give yellow crysts, mp 75° with gas evolution, whose structure was first thought to be (PhN N)2C(N02)2 (Ref 3). More recently the reaction with p-nitro benzenediazonium fluoroborate was examined in greater detail (Ref 11). The first prod isolated was the hydrazone p-02NC6H4NHN C(N02)2, orange-red crysts, mp 120—25° with decompn. It deflagrates when heated on a spatula, and its solns decomp slowly in the cold and more rapidly on heating, with evolution of oxides of N. From the mother-liquor was obtained another compd, mp 164°, which was considered to be a meso-ionic compd ... [Pg.93]

Ketone B.P. M.P. 2 4-DinltrO phenyi hydrazone Semiear bazone Benzal Derivative Phenyi- hydrazone p-Nitro- phenyi hydrazone Other Derivatives... [Pg.346]

By conventional procedures, 106 gm of benzaldehyde reacts in 600 ml of ether with 66 gm of anhydrous hydrazine to give benzalhydrazone which is directly oxidized in anhydrous ether with 300 gm of mercuric oxide to phenyl-diazomethane.) (See Volume I, Chapter 15, p. 398, for oxidation of hydrazones, p. 390 for an alternative preparation of phenyldiazomethane.)... [Pg.164]

Reaction of 16-bromo-17-ketone with hydrazinei6a-hydroxy-i7 hydrazone P. Catsoulacos and A. Hassner, J. Org. Chem., 32 (1967)... [Pg.228]

Aqueous NaI04 2.2 equiv., pH 7, 20-25 C suitable for ketone hydrazones, P-hydroxy groups are not affected HsIOfi 1 equiv., pH 4.5 buffer, 1 1 THF/H26,20-25 C, 2-3 h specific for aliphatic aldehydes Brj Et20... [Pg.523]

No Name Boiling point C Mdhn point X "n Di Semi carhd/one 2 4 Di nilrophenyl hydrazone p Nitro phenyl hydrd/one Phenyl hydrazone Oxime Miscellaneous... [Pg.161]

No Name Mellmg point, C Boding point "C Semi- carbazone 2,4 Di-nitrophcnyl-hydrazone p-Nitro- phenyl- hydrazonc Phenyl hydrazone Oxime Miscellaneous... [Pg.172]

No Name Melting poinl, °C Boiling pojnl, C Semi carbazone 2 4-Di nitrophenyl hydrazone p Nitro phenyl-hydrazone Phenyl- bydrazone Oxime Miscellaneous... [Pg.173]

No Name Melting point. C Boiling point, C Semi carbazone 2.4 Dl-mtrophenyl hydrazone p>Nitro phenyl- hydrazone Phenyl- hydrazone Oxime Miscellaneous... [Pg.176]

No Name Melting poini, C Boiling pCHni, C Semt- carbazone 2 4>Dinitro-phenyl hydrazone p-Niirov phenyl- hydrazone Pbenyl- hydrazone Oxime Miscellaneous... [Pg.184]

Specific rotalion 111 Phenylosazone (p> Phenyl- /i-Nilro- phenyl- hydrazone p-Bromo- phenyl- hydrazone ... [Pg.328]

Amide C OsNS. MW, 185. Plates or needles from H2O. M.p. 122t4 . Sol. HjO, EtOH, MeoCO. Spar. sol. EtjO. Hydrazone p lates and needles from 80% EtOH. M.p. 288-90 . Semicarbazone prisms from HjO. M.p. 250-1°. PhenyUiydrazone m.p. 244-5 deoomp. [Pg.217]

No Name Mehing point C Boiling point, C Semi- carbazone 2,4 Dmitro-phenyl-hydrazone p Nilro- phenyl- hydrazcMie Phenyl hydra Hic Oxime Miscellaneous... [Pg.182]

Specific rotation m liienylosazone Phenyl p Nitro phenyK hydrazone p-Bromo phenyl ... [Pg.330]

No Name Melting point, C Specific rotation in -butanol- Phenylosazone (p-Phcnyl- azobenzoate) p-Nitro phenyl hydrazone p Bromo phenyl-hydrazone Miscellaneous... [Pg.331]

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