(E)-5-tosyl-4-pentenamide: A vinyl sulfone for the one-pot general synthesis of indolizidine derivatives
作者:Francisco Caturla、Carmen Nájera
DOI:10.1016/s0040-4039(97)00736-3
日期:1997.5
(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 alpha,beta-unsaturated esters to provide stereoselectively differently substituted indolizidines 6. (C) 1997 Elsevier Science Ltd.
(E)-5-tosyl-4-pentenamide(3)是一种通过立体选择性碘砜化-脱碘化使4-烯酸酸酐(4-pentenoic acid)合成的,随后用氧化氯(oxalyl chloride)和氨(ammonia)进行进一步的 amidation反 应, 可 以 得 到。该化合物在DMF中与 NaH 在 室温下反应,随后与1,3-二价电位化合物(如1,3-双卤代物和α,β-不饱和酯)反应,可 以 产 生具 有 不 同 引物选择性取代位的标注6的立体 indolizidines。(C)1997 Elsevier Science Ltd.