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Phosphinic hydrazides reactions

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]

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]

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.
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]

See other pages where Phosphinic hydrazides reactions is mentioned: [Pg.188]    [Pg.168]    [Pg.136]    [Pg.114]    [Pg.4759]    [Pg.664]    [Pg.51]    [Pg.2164]    [Pg.2178]    [Pg.283]    [Pg.111]    [Pg.4758]    [Pg.356]    [Pg.3301]    [Pg.106]    [Pg.37]    [Pg.345]    [Pg.327]    [Pg.156]    [Pg.20]    [Pg.22]    [Pg.24]    [Pg.348]   
See also in sourсe #XX -- [ Pg.79 , Pg.99 ]



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