Vilsmeir reaction

Vasodilator, 30 Viloxazine, 306 Vilsmeir reaction, 189 Volazocine, 327 von Braim demethylation, 321... 

Vilsmeir Reaction Ferrocene undergoes Vilsmeir reaction to yield ferrocene carboxyaldehyde which is a useful starting material for the preparation of other ferrocene derivatives. 

The Vilsmeir reaction and the Mannich condensation are reactions which are shown by aromatic systems that are more reactive than benzene. It follows, therefore, that ferrocene is more aromatic than benzene. 

Vilsmeir reaction Diethyl azodicarboxylate. Vinylic substitution N-Bromosuccinimide. 

DL-Valeric acid, 369 Vanadium oxyacetylacetonate, 456 Vanadyl acetylacetonate, see Vanadium oxyacetylacetonate Vanillin, 217 Veratrole, 116 a-Vetivone, 306 Vilsmeir reaction, 129 Vinylacetic acid, 428 crr-Vinylalanes, 141, 142 mww-Vinylalanes, 141, 142 Vinyl azides, 100 Vinyl halides, 142 Vinylidinebisdimethylamines, 400 Vinyl ketones, 71 Vinyllithium, 456 Vinylmagnesium halides, 91 Vinyl triphenylphosphonium bromide, 456-457... 

Page 535, Subject Index, second column,remove Tetramethyl pyrophosphite, 397 Page 538, Subject Index, first column, Vilsmeir reaction, 129 change to Vilsmeier reaction, 129... 

Sulfur compounds have also been widely studied as activating agents for polyesterification reactions. p-Toluenesulfonyl chloride (tosyl chloride) reacts with DMF in pyridine to form a Vilsmeir adduct which easily reacts with carboxylic acids at 100-120° C, giving highly reactive mixed carboxylic-sulfonic anhydrides.312 The reaction is efficient both for aromatic dicarboxylic acid-bisphenol312 and hydroxybenzoic acid314 polyesterifications (Scheme 2.31). The formation of phenyl tosylates as significant side products of this reaction has been reported.315... 

Progress has been made in the experimental procedures for the formylation of pyrazoles (Vilsmeir-Haack reaction) at their 4 position <93JHC957, 94CPB237). For instance, 4/f-pyrazolo[l,5-a]indoles are formylated under milder eonditions than pyrazoles <94CPB237>. 

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See also in sourсe #XX -- [ ]

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