Diacetone alcohol, cleavage

Specific base Cleavage diacetone-alcohol CHjCO CH. C(OH)(CH,). =2(CH,). CO... [Pg.27]

Specific base Cleavage diacetone-alcohol CH3COCH2C(OH)(CH3)2 = 2(CH3)2CO ... [Pg.222]

The cleavage of diacetone alcohol by alkali catalyst to form acetone was followed by a dilatometer (Akerlof, JACS 49 2955, 1927). Diacetone alcohol was 5% by volume, KOH in water was 2N and the temperature was 25°C. Find the rate equation. [Pg.175]

Specific base Cleavage diacetone-alcohol CH3COCH2 C(OH)(CH3)2 =2(CH3)2 CO... [Pg.27]

Specific base Cleavage diacetone-alcohol Claisen condensation Aldol condensation CH3C0CH2-C(0H)(CH3)2 = 2(CH3)2C0 CgHjCHO -1- CH3 CHO = CgHj CHiCHO -1-H2O 2R CH2 CHO = R CH2CH(0H) CHR CH0 CH2 CH2 CH2 C 0 + H2O = CH2OH-CH2-CH2-COOH... [Pg.194]

Diacetone alcohol (DAA) is also halogenated at the a-position of the non-methyl group, followed by oxidation, halogenation of the methyl group, and finally chain cleavage. The overall reaction yielding the diol (DHMB) is... [Pg.103]

Following the study by Westheimer and Cohen [19] of the primary and secondary amine catalyzed dealdolization of diacetone alcohol which was proposed to occur through an essential imine intermediate. Speck and Forist [28] suggested that the S2une class of reaction may occur in aldolase. The first characterization of a stable covalent entity formed between substrate and enzyme was done by Horecker et al. [29] on transaldolase. This enzyme, which forms a stable complex with dihydroxy-acetone formed from the cleavage of fructose-6-P, was found to be susceptible to reduction by sodium borohydride. It was demonstrated that this adduct was formed... [Pg.280]

The effect of methyl deuteration on the cleavage of diacetone alcohol has also been determined by Pocker (141), who notes that base-catalyzed cleavage does not involve enolization, but simple decomposition of the alkoxide ion ... [Pg.186]

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