5-Aminofuro [3, 2-c] pyridinium tosylates and substituted furo [3, 2-c] pyridine N-oxides: Synthesis and reactions

M Bencková, A Krutošíková

文献索引：Benckova, Maria; Krutosikova, Alzbeta Collection of Czechoslovak Chemical Communications, 1999 , vol. 64, # 3 p. 539 - 547

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被引用次数: 17

摘要

Abstract 5-Aminofuro [3, 2-c] pyridinium tosylates 2a-2c were synthesized by direct N- amination of furo [3, 2-c] pyridines 1a-1c with O-(4-methylbenzenesulfonyl) hydroxylamine in dichloromethane. Zwitterionic furo [3, 2-c] pyridinium N-imides 3a-3c generated from 2a-2c and anhydrous potassium carbonate in N, N-dimethylformamide afforded by 1, 3-dipolar cycloaddition reactions with dimethyl butynedioate or ethyl propiolate the corresponding ...