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Q .17) C OPTION IS CORRECT ENOLIZABLE CARBONYL +AMINE + CARBONYL AS MANNICH REACTION INVOLES AN AMINE REACTION WITH CARBONYL TO FORM IMINE FOLLOWED BY REACTION WITH ENOLIZABLE CARBONYL TO FROM PRODUCT.
18) OPTION A IS CORRECT ENOLIZATION + MICHAEL ADDITION+ TAUTOMERIZATION +ALDOL CONDENSATION
19) c option is correct that is gabriel syntheis is process which involves reductive ammination
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17. The Mannich reaction process joins together which set of three components? a) Nitrile + Aldehyde...
16. What are the best reagents and reaction conditions to accomplish the kinetic allylation of 2-...
16. What are the best reagents and reaction conditions to accomplish the kinetic allylation of 2- methylcyclopentanone? a) NaOEt, allyl bromide, THF, room temperature b) LDA, THF, allyl bromide, -78 degrees C. c) i. Nah, cyclopropane, THF, ii. H30 d) i. Allyl magnesium bromide, dicthyl ether, ii. H:0* 17. The Mannich reaction process joins together which set of three components? a) Nitrile + Aldehyde + Ketone b) Iminium ion + Amine + Carbonyl c) Enolizable Carbonyl + Amine + Carbonyl...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a sequence beginning with a Mannich reaction between dimethyl acetonedicarboxylate, methylamine, and butanedial. The mechanism involves the following steps: 1. Following initial protonation of the carbonyl oxygen, nucleophilic attack by the amine forms carbinolamine 1; 2. Proton transfer and elimination of water forms iminium ion 2; he enol form of the dicarboxylate ester attacks the iminium ion to form adduct 3; 4. Adduct 3 tautomerizes...
16. What are the best reagents and reaction conditions to accomplish the kinetic allylation of 2- methylcyclopentanone? a) NaOEt, allyl bromide, THF, room temperature b) LDA, THF, allyl bromide, -78 degrees C. c) i. Nah, cyclopropane, THF, ii. H30 d) i. Allyl magnesium bromide, dicthyl ether, ii. H:0* 17. The Mannich reaction process joins together which set of three components? a) Nitrile + Aldehyde + Ketone b) Iminium ion + Amine + Carbonyl c) Enolizable Carbonyl + Amine + Carbonyl...
СО cat. H + NH2CH3 + H2CO2C CO2CH3 CO CHE Cocaine has been prepared by a sequence beginning with a Mannich reaction between dimethyl acetonedicarboxylate, methylamine, and butanedial. The mechanism involves the following steps: 1. Following initial protonation of the carbonyl oxygen, nucleophilic attack by the amine forms carbinolamine 1; 2. Proton transfer and elimination of water forms iminium ion 2; he enol form of the dicarboxylate ester attacks the iminium ion to form adduct 3; 4. Adduct 3 tautomerizes...
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