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Methyl-2,3-butadienoic acid

Since 3-methylenecyclobutane-l,2-dicarboxylic anhydride is easily converted to 3-methyl-2-cydobutene-l,2-dicarboxylic acid, it is an intermediate to a variety of cyclobutenes. The dimethyl ester of 3-methylenecyclobutane-l,2-dicarboxylic acid is also a versatile compound on pyrolysis it gives the substituted allene, methyl butadienoate, and on treatment with amines it gives a cyclobutene, dimethyl 3-methyl-2-cyclobutene-l,2-di-carboxylate. ... [Pg.30]

METHYL BUTADIENOATE (Butadienoic acid, methyl ester)... [Pg.71]

The method used is described by Drysdale, Stevenson, and Sharkey.4 The methyl ester of butadienoic acid has not been described previously, but the free acid contaminated by 2-bu-tynoic acid has been prepared by Wotiz, Matthews, and Lieb 5 by carbonation of propargylmagncsium bromide. Ethyl butadienoate has been prepared by Eglinton, Jones, Mansfield, and Whiting by alkali-catalyzed isomerization of ethyl 3-butynoate prepared from 3-butynol by chromic acid oxidation and esterification. [Pg.72]

Butadiene, 1,4-diphenyl-, 40, 36 Butadienoic acid, methyl estfr, 43, 71... [Pg.108]

Butadienoate esters undergo AICI3 and EtAlCh catalyzed stereospecific [2 + 2] cycloadditions with a wide variety of alkenes to give alkyl cyclobutylideneacetates in good yield. The stereospecificity and ratios of ( )- and (Z)-isomers suggest a [ 2 + v2a] cycloaddition of the ester-Lewis acid complex to the alkene analogous to the cycloaddition of ketenes with alkenes. Similar results are obtained with methyl 2,3-pentadienoate, methyl 4-methyl-2,3-pentadienoate and methyl 2-methyl-2,3-butadi-... [Pg.10]

Suzuki coupling. This coupling uses nontoxic boronic acids therefore, it is preferred in the preparation of drug candidates such as 2-aryl- and 2-alkenyl-carbapenems. In a synthesis of methyl 2-aryl-2,3-butadienoates the Suzuki coupling is aided by Ag20. ... [Pg.391]


See other pages where Methyl-2,3-butadienoic acid is mentioned: [Pg.453]    [Pg.453]    [Pg.306]    [Pg.157]    [Pg.867]    [Pg.855]    [Pg.27]    [Pg.16]   


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1.2- Butadienoic acid reaction with C-methyl-N-phenylnitrone

2.3- Butadienoates

2.3- Butadienoic acid

2.3- butadienoate

Butadienoic acid, methyl ester

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