Silver‐Promoted Radical Ring‐Opening
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Pyridylation of Cyclobutanols with
<i>N</i>
‐Methoxypyridinium Salts
作者:Yu Chen、Guang‐Yi Zhang、Chan Guo、Ping Lan、Martin G. Banwell、Yu‐Tao He
DOI:10.1002/chem.202104627
日期:2022.3.16
An efficient silver-catalyzed radicalring-opening/pyridylation of tertiary cyclobutanol with N-methoxypyridinium salts has been achieved for the synthesis of γ-ketopyridines. The overall process is thought to occur by β-scission of the corresponding cyclobutoxy radical to generate an alkyl radical, that adds to the pyridinium salt. A wide range of tertiary cyclobutanols and N-methoxypyridinium salts
Silver-Catalyzed 1,3-Aza-Benzyl Migration of Allyl Alcohol
作者:Chuan-Ming Hong、Si-Qi Xiong、Xue Zhang、Kai-Xian Ma、Qing-Hua Li、Tang-Lin Liu
DOI:10.1021/acs.orglett.2c02809
日期:2022.10.28
Carbon migration of alkenyl alcohols has been recognized as an increasingly viable methodology in organic synthesis. Herein, we disclose a silver-catalyzed 1,3-aza-benzyl migration of allyl alcohols by utilizing chelation-assisted selective cleavage of an unstrained C(sp3)–C(sp3) bond. This approach provides an available, efficient, high atom-economic, and environmentally benign procedure, leading
4-substituted octahydroquinolizine analgesic compounds and octahydroquinolizinium intermediates
申请人:McNeilab, Inc.
公开号:EP0241292A2
公开(公告)日:1987-10-14
Octahydroquinolizine and corresponding octahydroquinolizinium compounds of formulae (I) and (Va):
where A is a 3 to 7 membered carbocyclic ring, R¹ is a substituent, n is 0-2, x is 0-3, and Y is an anion. Also, pharmaceutical compositions for treating pain containing (I) and methods for synthesis and use as well as novel intermediates in the synthesis.