Tetrahedron Letters p. 3789 - 3792 (1997)
Update date:2022-09-26
Topics:
Caturla, Francisco
Najera, Carmen
(E)-5-tosyl-4-pentenamide (3), easily prepared from 4-pentenoic acid by stereoselective iodosulfonylation-dehydroiodination and further amidation with oxalyl chloride and ammonia reacts with sodium hydride at room temperature in DMF and then with 1,3-dielectrophiles such as 1,3-dihalides and α,β-unsaturaled esters to provide stereoselectively differently substituted indolizidines 6.
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