Ir(I)-Catalyzed Synthesis of <i>N</i>-Substituted Pyridones from 2-Alkoxypyridines via C–O Bond Cleavage
作者:Shiguang Pan、Naoto Ryu、Takanori Shibata
DOI:10.1021/ol400557z
日期:2013.4.19
A cationic Ir(I) complex-catalyzed O-to-N-alkyl migration in 2-alkoxypyridines bearing a secondary alkyl group on the oxygen atom by C-O bond cleavage is described. The present transformation gave various N-alkylpyridones in moderate to good yields. The addition of sodium acetate played a key role in suppressing beta-hydrogen elimination.
[1,2]-Wittig Rearrangement of Aromatic Heterocycles
作者:Gregory B. Dudley、Apiwat Wangweerawong、Jingyue Yang
DOI:10.3987/com-12-12492
日期:——
Anionic rearrangement of diverse heteroaryl ethers is reported. In many cases, directed metallation followed by formal [1,2]-Wittig rearrangement provides heteroaryl carbinols in good yield.
[1,2]-Anionic Rearrangement of 2-Benzyloxypyridine and Related Pyridyl Ethers
作者:Jingyue Yang、Gregory B. Dudley
DOI:10.1021/jo901707x
日期:2009.10.16
An anionic rearrangement of 2-benzyloxypyridine is described. Pyridine-directed metalation of the benzylic carbon leads to 1,2-migration of pyridine via a postulated associative mechanism (addition/elimination). Several aryl pyridylcarbinols were obtained in high yields. A formal synthesis of carbinoxamine, an antihistamine drug used for the treatment of seasonal allergies and hay fever, emerges from