Synthesis of Tertiary Amines Using a Polystyrene (REM) Resin
作者:Angus R. Brown、David C. Rees、Zoran Rankovic、J. Richard Morphy
DOI:10.1021/ja963829f
日期:1997.4.1
tertiary amines was constructed using a “traceless” linker on a polystyrene resin (REM resin), starting from secondary amines, primary amines, and resin-bound “ammonia”. The methodology is characterized by three essential steps conducted under ambient conditions: (1) coupling of the starting amine (Michael addition) to the resin, (2) activation (quaternization), and (3) cleavage of the product amine (Hofmann
The REM resin for solid phase synthesis is described. Its use is illustrated by preparing a small array of tertiary amines using a Hofmann elimination reaction. No functional group is required for linking these compounds onto the resin other than the amine constructed during the synthesis.
Efficient synthesis of tertiary amines from secondary amines
作者:Michio Kurosu、Sevendu Sekhar Dey、Dean C. Crick
DOI:10.1016/j.tetlet.2006.05.038
日期:2006.7
N-alkylations of secondaryamines have been developed. By using DIAD and TPP (or PS-TPP) a variety of secondaryamines can be converted to the corresponding tertiaryamines in good to excellent yields with diverse alkylhalides; no formation of quaternary amine salts are observed. These protocols are amenable to combinatorial chemistry libraries, and are also useful for the syntheses of secondaryamines by an
Tandem Formation and [2,3] Rearrangement of Methylene Ammonium Ylides Derived from Amines and the Simmons−Smith Reagent
作者:Varinder K. Aggarwal、Guang yu Fang、Jonathan P. H. Charmant、Graham Meek
DOI:10.1021/ol034404i
日期:2003.5.1
[reaction: see text] Zinc-complexed methylene ammoniumylides are formed from tertiary amines and the Simmons-Smith reagent. These stable entities can be activated with n-BuLi to allow reactions typical of ammoniumylides such as [2,3] rearrangements. In the case of oxazolidine 12, ylide formation, activation, and subsequent [2,3] rearrangement was highly efficient and occurred with very high diastereoselectivity