Harnessing Protonated 2,2′-Bipyridinium Salts as Powerful Brønsted Acid Catalysts in Organic Reactions
作者:Wen Hu、Jiaqi Xiang、Qi Zhou、Xinyu Gao
DOI:10.1021/acs.joc.2c02239
日期:——
time that the readily available protonated 2,2′-bipyridinium salts are used as Brønstedacidcatalysts to accelerate a series of organic transformations that included the hydration of aromatic alkynes, etherification of alcohols, cyclotrimerization of aliphatic aldehydes, Ritter reaction, Mannich reaction, Biginelli reaction, preparation of substituted alkenes from alcohols, synthesis of spirooxindole
Brominative Deoxygenation of some aldehydes and ethers
作者:Ulrich Von Roman、Rudolf Knorr、Claudia Behringer、Jakob Ruhdorfer
DOI:10.1002/prac.19943360313
日期:——
Three aldehydes (4a-c) are transformed into 1,1-dibromides (6a-c) by 2,2,2-tribromo-2,2-dihydro-1,3,2-benzodioxaphosphole (2). This reagent (2) is also very active in the cleavage of ethers, its reactions may show some features of carbonium as well as Of S(N)2 character.
Richard, Annales de Chimie (Cachan, France), 1910, vol. <8> 21, p. 394
作者:Richard
DOI:——
日期:——
Franke; Hinterberger, Monatshefte fur Chemie, 1922, vol. 43, p. 658
作者:Franke、Hinterberger
DOI:——
日期:——
Sato, Satoshi; Furuta, Hiromi; Sodesawa, Toshiaki, Journal of the Chemical Society. Perkin transactions II, 1993, # 3, p. 385 - 390