(c) Thc rcactions of o,ß-unsaturated ketones such as I (R' and RP are both alkyl groups) with amincs such as II (R? - al

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C Thc Rcactions Of O Ss Unsaturated Ketones Such As I R And Rp Are Both Alkyl Groups With Amincs Such As Ii R Al 1 (247.37 KiB) Viewed 59 times

(c) Thc rcactions of o,ß-unsaturated ketones such as I (R' and RP are both alkyl groups) with amincs such as II (R? - alkyl) can give two different major organic products (i.c. excluding 1170 as a product) depending on the reactions conditions employed. If some method of water removal is employed during the reaction (e.g. by using molecular sieves), product III is formed as the major product (Reaction A shown below) through a process involving several intermediates. Il' no means of removing water is employed, product IV is formed as the major product (Reaction B shown below) through a process involving one intermediate. Reaction A + H2N-R3 Product III + H20 R1 R2 I II H2O is removed (e.g. molecular sieves) Reaction B + H2N-R Product IV R' R2 No H20 removal I II What does the fact that H2O must be removed in Reaction A indicate about the reaction of I + II to form product III? Suggest structures for product III and product IV, and explain your rationale in picking these structures. Explain why product IV is formed in preference to product III in Reaction B (i.e. if H20 is not removed from the reaction mixture).