Reaction of Acetyl Bromide and Acetyl Chloride with Urethans
作者:Dov Ben-Ishai、Ephraim Katchalski
DOI:10.1021/jo50001a002
日期:1951.7
One-Pot Formation of Piperidine- and Pyrrolidine-Substituted Pyridinium Salts via Addition of 5-Alkylaminopenta-2,4-dienals to <i>N</i>-Acyliminium Ions: Application to the Synthesis of (±)-Nicotine and Analogs
triflate, followed by dehydrative cyclization, allowed the formation of pyridiniumsalts substituted at their 3-position by a five- or six-membered nitrogen heterocycle. Subsequent N-dealkylation of the pyridinium moiety and deprotection of the secondary amine or reduction of the carbamate function led to (±)-nicotine and analogs.