
4.2 The following compound can form two different enols Propose a mechanism for the formation of...
Draw the two possible enols that can be formed from 3-methyl-2-butanone and show a mechanism of formation of each under basic conditions (NaOH/H2O). Show mechanisms.
B) Propose a mechanism of the following reaction (enamines are like enols, but more reactive). 1)DMSO/H2O/Cat H30 1.0 equiv Br2 I Br
propose a mechanism for the formation of this
compound.
the the major ketal product is ethyl acetoacetate
ethylene ketal.
4. (in H22 Os veyi acciacciate. 4. The ketal product contains a minor amount (< 0.1%) of a substance, C4H20s whose molecular structure contains ester and ketal groups. Propose a structure for the compound and a mechanism for its formation.
1. Propose a curved arrow mechanism for the formation of the products in the reaction below. Hint: Alkenes can react with strong acids to form carbocation intermediates and there are 2 separate products formed by 2 separate mechanisms. (20) H2SO4
if full explanations can be provided it would be
appreciated
Propose a mechanism that explains formation of the products from the following reaction, including the distribution of the products as major and minor. [6] H.SO. (cat.) Major Minor 11 11 111mm in tuanted with
4. List two different sets of reagents (each set consisting of a carbonyl compound and a Grignard reagent) that could be used to synthesize each of the following secondary alcohols. [4 points each] 3H 5. Reaction of cyclohexanone with ethylene glycol in the presence of an acid catalyst gives the cyclic acetal shown. Propose a mechanism for this reaction. [8 points]
4. Propose a mechanism for the formation of the following products OH +OH Br 5. Draw the structure of product formed in the following reaction Cl C4HgS Na DMSO Cl Draw the mechanism leading to product formation.
Propose a synthesis for the compound D shown below, starting with benzene. Identify appropriate reagents, reaction conditions and give the detailed mechanism for the formation of the azo bond.
8. Propose a reasonable mechanism to account for the formation of the following product: OCH2CH3 CH3CH OH Heat
1) Propose a mechanism for the following two-step transformation. Be sure to include all curved arrows, intermediates, and by-products. (5 marks) Br -OH 1) NaOH, HO 2) HBO Br OH 2) Propose a synthesis for the transformation below. You may use any reagent discussed in the course notes or textbook, as well as any additional compound with 2 or fewer C atoms in your solution. (5 marks) هر