A Short Synthesis of Benzomorphane Analgesics (±)-Metazocine and (±)-Phenazocine
作者:Kamal Nain Singh、Pushpinder Singh、Arvind Kumar Sharma、Paramjit Singh、Satinder V. Kessar
DOI:10.1080/00397910903531722
日期:2010.11.16
A three step synthesis of (+/-)-metazocine and (+/-)-phenazocine starting with 3,4-lutidine is described. The key step involves Lewis acid promoted lithiation/electrophilic substitution reaction of N-alkyl-3,4-dimethyl-1,2,5,6- tetrahydropyridine.
Transformations of 1-phenethyl-1,2,3,6-tetrahydropyridines in the presence of trifluoromethanesulfonic acid
作者:Vera A. Shadrikova、Alexander S. Popov、Maria V. Termelyova、Marat R. Baimuratov、Yuri N. Klimochkin
DOI:10.1007/s10593-020-02748-8
日期:2020.7
1-Phenethyl-1,2,3,6-tetrahydropyridines undergo intramolecular Friedel–Crafts reaction in trifluoromethanesulfonic acid medium, resulting in the formation of azatricyclic structures. It was shown that the direction of this reaction depended on the position of the substituent relative to the multiple bond in tetrahydropyridine. The structures of the obtained compounds were confirmed by a set of spectral