Hydrazine N

Hydrazin-N,N -dicarbonsaure-diester werden durch Lithiumalanat zu 1,2-Dime-thyl-hydrazinen reduziert. N,N-Unsubstituierte Diester verbrauchen zur Reduktion... [Pg.133]

N-Monosubstituierte Derivate werden nicht einheitlich reduziert. So liefert Fluorenyl-(9)-hydrazin-N,N -dicarbonsaure-diathylester 1-Methyl-1 -fluorenyl-(9)-hydrazin-2-car-honsaure-aihylester (I 77% d.Th.)3, wahrend 7a-(l,2-Dimethoxycarbonyl-hydrazino)-4,4-dimethyl-/J5(6),8(9)-steroide II unter Aromatisierung fragmentiert und z.Tl. dimeri-siert werden. Bei den entsprechenden zl5(6) a(I4)-Steroiden tritt die Dimerisierung in den Vordergrund4. [Pg.134]

Recent studies have been directed towards the synthesis of heterocyclic hydrazones which have lower toxicities than thiosemicarbazones [44], It has been proposed that the hydrazinic N-H group is essential for activity since it might be involved in a crucial radical formation step important in the mechanism of RDR. This is supported by the loss of antileprotic activity for this series of compounds when the hydrazinic hydrogen is replaced by a methyl group [44]. The heterocyclic hydrazones, like thiosemicarbazones, behave as tridentate ligands. [Pg.6]

The interaction of thiosemicarbazide with Ni11 has been studied in solution and in the solid state, and the properties and stereochemistry of two isomeric forms, a and (3, of [Ni(432)3]I2 have been reported. The crystal structure of the /3-form reveals that Ni is octahedrally coordinated by three molecules of (432) through their S and hydrazine N atoms.1220... [Pg.355]

This specification covers the requirements for hydrazine (N 2H4) propellant... [Pg.205]

Hydrazinophenol, C6H4(OH).HN.NH2 mw 124.14, N 22.57% crysts, mp—unstable. It can be prepd as hydrochloride salt by heating N- [4-hydroxyphenyl)-hydrazine-N -sulfonic acid K with ale HC1 forms other salts Refs 1) Beil 15, 596 2) Altschul, JPrakt-... [Pg.209]

Nitro-2-hydrazinotoluene, It golden-yel or orn-yel ndls with a violet tinge (from ale), mp 179-80° diffc sol in hot ale xylene was prepd by heating the K salt of N-[4-Nitro-2-methyl-phenyl] -hydrazine-N,N -disul-fonic acid with coned HC1 (Refs 1 3) 3-Nitro-4-hydmzinotoluene, dk-red ndls (from eth), mp 110—11° v sol in acet sol in eth, chlf benz si sol in petr eth was prepd by diazotizing 2-nitro-4-methylaniline with Zn chloride HC1. Its Hydrochloride salt, C7H9N3O2+HCI, orn-red ndls or plates (from w) dec at 190-91° (Refs 2 4)... [Pg.210]

Probtom 1.6 Write Lewis structures for (a) hydrazine, N,H4 (6) phosgene, COCl (c) nitrous acid, HNOj. [Pg.4]

Diethyltribromobenzene-azohydrazine-dicar-baxylate [called l-(2.4.6-Tribrom-phenyl)-t etraze n -(1 )-d ica rh on s au re -(3.4)-d iathy le ste r or (2.4.6-Tribrom-benzoIdiazo)-hydrazin-N.N -dicarbonsaurediathylester in Ger],... [Pg.148]

The 5-(aminomethyl)thiophene-2-acetic acid isomer 76 was prepared by chloromethylation in position 2 of thiophene followed by nucleophilic displacement with phthalimide to afford 81, and a second chloromethylation in position 5 to give 82 (Scheme 23). Subsequent reaction with cyanide gave 83, the hydolysis of which afforded the phthalide-protected amino acid 84 which was coupled to H-Ala-Ile-Gly-OMe using propanephosphoric anhydride, followed by hydrazine N-deprotection)110 ... [Pg.628]

For the free ligand, the hydrazinic N lies tram to the S atom (52a), whereas to form chelated complexes a cis arrangement (52b) must be present. The only structures of complexes known so far in the trans configuration are polymeric silver(I) complexes.436... [Pg.830]

Biurea called Hydrazin-N.N -dicarbonsaure -diamid Hydrazodicarbonamid Hydrazo -formamid and Kohlensaure-amid-tcarbaminyl -hydrazid] in Get, ... [Pg.164]

Carbohydrazide- N- earbamay (called 1 - Carbamoyl-carbohydrazid or Hydrazin-N.N -dicarbosaure-amid-hydrazid in Ger),... [Pg.449]

In crystals of compound 136, mp 57°C, two six-membered rings each in a half chair conformation are linked solely through the hydrazine N—N bond (Fig. 14). The two planar NNSi2 units are at right angles, as expected for a nonforced tetrahydrazine geometry. The N—N bond is longer in 135 than in 136. (See Table XXII.)... [Pg.41]

Nucleophiles react with NH or N-acyl oxaziridines at the nitrogen. Much of this chemistry has been carried out with cyclohexanespiro-3-oxaziridine 39 an intermediate 40 proceeds to cyclohexanone, the result being amination of the nucleophile. Transfers of NH to N-, 0-, S-, and C-nucleophiles enable the syntheses of hydrazines, N-amino-peptides, hydroxyamines, sulfenamides, thiooximes, sulfonamides, aziridines, and -amino acids. [Pg.617]

Dextran-graft-Octa-4,6-dienoic acid hydrazine-N-imidoether (Eneophile Intermediate-3)... [Pg.224]

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