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Hydrazides s. Carboxylic

Hydration of carbon-carbon double bonds s. a. Alcohols from ethylene derivatives —, preferential 16, 194 19, 183 —, stercospecific 16, 194 Hydrazides s. Carboxylic acid... [Pg.328]

Hydrogen chloride acetic acid Carboxylic acids from carboxylic acid hydrazides s. 24,196... [Pg.61]

Hydrazides (s. a. Carboxylic acid hydrazides) reduction with borane 26,56 Hydrazine (s. a. Wolff-Kishner reduction) 26,15 reaction with dicarboxylic acid anhydrides 8, 482... [Pg.269]

Carboxylic acid hydrazides from carboxylic acid esters GOOR -v CONHNHg with cis-frans-rearrangement s. 17, 413... [Pg.135]

Carboxylic acid hydrazides from carboxylic acids—Hydroxamic acids from 1-acylimidazoles—Carboxylic acid amides s. 18, 441... [Pg.141]

Carboxylic acid amides from sulfimides via carboxylic acid hydrazides s. 16, 23... [Pg.404]

Hexokinase, 287 Homoarginine, 552, 553 Homobiotinyl p-nitrophenyl ester, 615 Homoserino, 156, 414 Hydrazides as inhibitors, 38 test for, 211 Hydrazines, 210 synthesis of, 210 Hydrazones, test for, 211 Hydrocinnamaldehyde, 125 Hydrocinnamic acid, 123 Hydrofluoric acid, 201 Hydrogenation, 200 Hydrogen peroxide, 49-51, 315 Hydrophobic probes, 191 3/S-Hydroxy-5-androstene-17/S-carboxylic acid, 477... [Pg.765]

Subst. carboxylic acid hydrazides from carboxylic acids GOOH GONHNHR via carboxylic acid chlorides s. 13, 462... [Pg.152]

Subst. carboxylic acid amides from carboxylic acid hydrazides via carboxylic acid azides s. 14-, 486 CONHNH2 CON<... [Pg.505]

Oximes of higher aliphatic aldehydes s. 11, 506 Substitution of carboxylic acid hydrazides s. 11, 507... [Pg.508]

List [86] and Jorgensen [87] have recently independently described a novel application of L-proline (107) for catalysis of enantioselective hydrazidation of aldehydes [88]. For example, when aldehyde 106 is allowed to react with di-tert-butyl azodicarboxylate (95) in the presence of 10 mol% 107, adduct 108 is isolated in > 90% yield and 93% ee (Scheme 10.18) [87]. The product hydra-zides can be transformed into protected amino acid derivatives through a sequence that involves oxidation of the aldehyde to the corresponding carboxylic acid, esterification, deprotection, and N-N bond cleavage with Raney-Ni [86, 87]. The observed selectivity has been attributed to the intervention of transition state 111 [86]. This structure incorporates a hydrogen bond between proline s carboxyl group and the azodicarboxylate as a key organizing feature. The transition state structure has parallels to that proposed for the proline-cata-lyzed aldol addition reactions and is supported by quantum mechanical studies by Houk [89]. [Pg.328]

Peroxyacetic acid is a better oxidizing agent for hydrazine derivatives than yellow mercuric oxide and can be used in solvents in which the reactants are sufficiently soluble. F. e. and reactions such as cleavage of semicarbazones, formation of diacylhydrazines from carboxylic acid hydrazides, s. L. Horner and H. Fernekess, B. 9A, 712 (1961) s. a. Synth. Meth. 16, 58, 254, 359. [Pg.96]

Thiazole carboxylic acid hydrazides were prepared in a similar way (444, 445). Thus by refluxing thioacetamide or thiobenzamide with y-bromoaceto acetic ester arylhydrazones (83) for several hours in alcohol the 4-carboxythiazole derivatives (84) listed in Table II-ll were obtained (Scheme 36) (656). This reaction is presumed to proceed via dehydration of the intermediate, thiazoline-S-oxide. [Pg.206]

Claisen ester condensation, 6, 279 Thiazolecarboxylic acid chlorides reactions, 6, 279-280 Thiazolecarboxylic acid hydrazides synthesis, 6, 280 Thiazolecarboxylic acids acidity, 6, 279 decarboxylation, 6, 279 reactions, S, 92 6, 274 Thiazole-2-carboxylic acids decarboxylation, S, 92 Thiazole-4-carboxylic acids stability, S, 92 Thiazole-5-carboxylic acids decarboxylation, S, 92 Thiazole-4,5-dicarboxylic acid, 2-amino-diethyl ester reduction, 6, 279 Thiazole-4,5-dicarboxylic acids diethyl ester saponification, 6, 279 Thiazolediones diazo coupling, 5, 59 Thiazoles, 6, 235-331 ab initio calculations, 6, 236 acidity, S, 49 acylation, 6, 256 alkylation, S, 58, 73 6, 253, 256 analytical uses, 6, 328 antifogging agents... [Pg.873]

Amino-S-hy droxy-1,2,3-triazole-4-carboxylic acid hydrazide 1 A218... [Pg.461]

See other pages where Hydrazides s. Carboxylic is mentioned: [Pg.239]    [Pg.234]    [Pg.260]    [Pg.259]    [Pg.239]    [Pg.234]    [Pg.260]    [Pg.259]    [Pg.454]    [Pg.141]    [Pg.109]    [Pg.121]    [Pg.1174]    [Pg.85]    [Pg.285]    [Pg.260]    [Pg.157]    [Pg.144]    [Pg.2417]    [Pg.139]    [Pg.140]    [Pg.142]    [Pg.438]    [Pg.919]    [Pg.614]    [Pg.622]    [Pg.224]    [Pg.85]    [Pg.812]    [Pg.1161]    [Pg.1204]    [Pg.804]   


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Carboxylic hydrazides

Hydrazide carboxylates

Hydrazides s. Carboxylic acid

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