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Phosphinic hydrazides

The analogous solidtliquid two-phase alkylation at the more acidic NH position of the diphenylphosphinic hydrazides (Table 5.27) proceeds smoothly in the presence of tetra-rt-butylammonium hydrogen sulphate [54], No reaction occurs under the standard liquiddiquid conditions. Hydrolysis of the A-alkylated phosphinic hydrazides in refluxing dilute hydrochloric acid provides a convenient and efficient route to A-alkylhydrazines [54], The reaction has been extended to the preparation of A. A -dialkylhydrazines from diphenylphosphinic hydrazide by acylation of the... [Pg.192]

Vibrational data and crystal parameters have been obtained for two isomeric dihydrazides (59),379 and the synthesis of a number of PP-diaryl-phosphinic hydrazides (RC6H4)2P(0)NHNH2 from the corresponding... [Pg.361]

Many alkyl and aryl phosphinic hydrazides (7.208d) and phosphoric hydrazides (7.208a) can be obtained from hydrazine and phosphinic chlorides or phosphorochloridates ((7.209) and (7.210)). Products of this kind are stable in alkaUne media, but under strongly acid conditions the P-N linkages are split. [Pg.528]

Some substituted phosphinic hydrazides or phosphinic dihydrazides can be obtained from the appropriate substituted hydrazine as, for example, (7.213). A range of phosphoroamidic hydrazides can be obtained by gradual addition of dialkyl or diaryl phosphorochloridates to excess hydrazine hydrate in benzene at 40°C (7.214). [Pg.529]

Phosphinic hydrazides react with ketones to produce hydrazones (7.220). Phosphoric hydrazides will phosphorylate phosphate anions to give pyrophosphates (7.221). [Pg.529]

The phosphinic isocyanates (116) and isothiocyanates (117) react with oxygen, nitrogen, and phosphorus nucleophiles by attack at carbon rather than phosphorus. Phenyl phosphonodichloridate has been recommended as a useful reagent for the activation (presumably by mixed anhydride formation) of carboxylic acids for conversion to amides and hydrazides. ... [Pg.119]

Stereochemistry. - There has been a far infra-red spectroscopic study of ethyl phosphine,130 and in combination with X-ray fluorescence, further work completed on the conformational analysis of dialkylphenyl phosphines.131 The influence of water on the conformational equilibria of trimethyl phosphate has received attention.132 There has been a low temperature solid state and matrix isolation study of methyl phosphorodichi oridate,133 and a conformational study of polymorphic modifications of diphenyl-phosphinyl acetic acid hydrazide. 34... [Pg.406]

A series of amides, hydrazides, and azides of phosphoric, phosphonic, and phosphinic acids were synthesized via the corresponding pyrazolides. [Pg.278]

Numerous other complexes of beryllium with organic ligands such as alloxides (276-280), /6-diketonates (90, 281-297), SchifF bases (64, 298-301), thiols (302), pyridines (303), bipyridyl (304), phthalocya-nine (305), hydroxyquinolines (306, 307), tropolones (308, 309), pyra-zolylborates, (94, 310), phosphinates (311), hydrazides (312), phenyl-hydrazonocarboxylates (313), dinaphthofuchsonedicarboxylates (314),... [Pg.162]

Metal cyanides(and cyano complexes), 216 Metal derivatives of organofluorine compounds, 217 IV-Metal derivatives, 218 Metal dusts, 220 Metal fires, 222 Metal fulminates, 222 Metal halides, 222 Metal—halocarbon incidents, 225 Metal halogenates, 226 Metal hydrazides, 226 Metal hydrides, 226 Metal hypochlorites, 228 Metallurgical sample preparation, 228 Metal nitrates, 229 Metal nitrites, 231 Metal nitrophenoxides, 232 Metal non-metallides, 232 Metal oxalates, 233 Metal oxides, 234 Metal oxohalogenates, 236 Metal oxometallates, 236 Metal oxonon-metallates, 237 Metal perchlorates, 238 Metal peroxides, 239 Metal peroxomolybdates, 240 Metal phosphinates, 240 Metal phosphorus trisulfides, 240 Metal picramates, 241 Metal pnictides, 241 Metal polyhalohalogenates, 241 Metal pyruvate nitrophenylhydrazones, 241 Metals, 242 Metal salicylates, 243 Metal salts, 243 Metal sulfates, 244 Metal sulfides, 244 Metal thiocyanates, 246 Metathesis reactions, 246 Microwave oven heating, 246 Mild steel, 247 Milk powder, 248... [Pg.2639]

Metal deactivators Chelating agents (hydrazones, oxamindes, hydrazides, phosphates, phosphines)... [Pg.637]

Figure 5. Bioorthogonal reactions on sugars, A. Ketones react with hydrazides to give hydrazones. B. Thiols undergo Michael Reaction with maleimides. C, Azides undergo Staudinger ligation with phosphines or D. strain-promoted or copper catalyzed [3 2] cycloaddition with all nes. E. Alkynes undergo copper-catalyzed [3- 2] cycloaddition with azides. Figure 5. Bioorthogonal reactions on sugars, A. Ketones react with hydrazides to give hydrazones. B. Thiols undergo Michael Reaction with maleimides. C, Azides undergo Staudinger ligation with phosphines or D. strain-promoted or copper catalyzed [3 2] cycloaddition with all nes. E. Alkynes undergo copper-catalyzed [3- 2] cycloaddition with azides.
Aryl hydrazides such as ArNiBociN B0CNHNH2)." A phosphine-free cauly 1,3-bis(2,6-diisopropylpheny 1 )imidazob this additive becomes ligated to the Pd 1... [Pg.468]

Functionalised aminophosphines, e.g. (35), can be conveniently purified and stored as their air- and water-stable borane adducts (36) these with hydrogen chloride gave the chlorophosphine adducts (37) which were useful for the preparation of functionalised phosphines. An improved method to prepare N-pyrrolylphosphines (38) and (39) has appeared. The related A -indolylphos-phines (40) have been similarly prepared. Two papers describe the preparation of the tervalent phosphorus hydrazides (41) and (42) for use as chelating ligands. [Pg.84]

The compounds previously obtained from acyl hydrazides and phosphorus trihalides have now been obtained using tris(dimethyIamino)-phosphine and shown to be the spirophosphoranes (91). The oxathia-phospholans (92) are less reactive towards a-diketones than are the corresponding dioxaphospholans. The phosphites (93) and (94) exist as such and do not give the trioxythiophosphoranes. ... [Pg.49]

Useful preparative procedures have been given for the conversion of phosphonic and phosphinic chlorides to amides and hydrazides. The reverse reaction also may be useful in synthesis and is best carried out by treating the appropriate amide with hydrogen chloride in an inert solvent. This latter reaction not unexpectedly proceeds with retention of configuration on (85), whereas the acyclic analogues undergo racemization. ... [Pg.133]

All the agrochemicals listed are sold commercially and are trademarked/registered. Each should have a symbol after the product name, except the following agrochemicals DDT, 3-hydroxycarbofuran, maleic hydrazide, phosphine and TDE. [Pg.938]

See other pages where Phosphinic hydrazides is mentioned: [Pg.155]    [Pg.168]    [Pg.622]    [Pg.136]    [Pg.114]    [Pg.3724]    [Pg.4150]    [Pg.4759]    [Pg.229]    [Pg.664]    [Pg.51]    [Pg.2164]    [Pg.2178]    [Pg.1391]    [Pg.252]    [Pg.283]    [Pg.111]    [Pg.3723]    [Pg.4149]    [Pg.4758]    [Pg.356]    [Pg.3301]    [Pg.3301]   


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