155155-73-0Relevant academic research and scientific papers
(R,R)-2,5-Diphenylpyrrolidine: Diastereoselective radical addition to the derived methacrylamide
Taber, Douglass F.,Gorski, Gregory J.,Liable-Sands, Louise M.,Rheingold, Arnold L.
, p. 6317 - 6318 (1997)
Radical addition of thiophenol to the methacrylamide 1 proceeds with high diastereoselectivity, to give 2 and 3 in a ratio of 25:1.
Asymmetric Synthesis of Enantiopure Pyrrolidines by C(sp3)?H Amination of Hydrocarbons
Darses, Benjamin,Dauban, Philippe,Lazib, Yanis,Retailleau, Pascal,Saget, Tanguy
, p. 21708 - 21712 (2021/08/30)
The asymmetric synthesis of enantiopure pyrrolidines is reported via a streamlined strategy relying on two sequential C?H functionalizations of simple hydrocarbons. The first step is a regio- and stereoselective catalytic nitrene C?H insertion. Then, a su
A general, enantioselective synthesis of 2-substituted thiomorpholines and thiomorpholine 1,1-dioxides
Reed, Carson W.,Lindsley, Craig W.
, (2019/09/10)
In the course of our drug discovery programs, we had need to access chiral, 2-substituted thiomorpholines and their oxidized congeners, thiomorpholine 1,1-dioxides. Here, we disclose a high-yielding, general protocol for the enantioselective synthesis of
Direct α-C-H bond functionalization of unprotected cyclic amines
Chen, Weijie,Ma, Longle,Paul, Anirudra,Seidel, Daniel
, p. 165 - 169 (2018/02/06)
Cyclic amines are ubiquitous core structures of bioactive natural products and pharmaceutical drugs. Although the site-selective abstraction of C-H bonds is an attractive strategy for preparing valuable functionalized amines from their readily available parent heterocycles, this approach has largely been limited to substrates that require protection of the amine nitrogen atom. In addition, most methods rely on transition metals and are incompatible with the presence of amine N-H bonds. Here we introduce a protecting-group-free approach for the α-functionalization of cyclic secondary amines. An operationally simple one-pot procedure generates products via a process that involves intermolecular hydride transfer to generate an imine intermediate that is subsequently captured by a nucleophile, such as an alkyl or aryl lithium compound. Reactions are regioselective and stereospecific and enable the rapid preparation of bioactive amines, as exemplified by the facile synthesis of anabasine and (-)-solenopsin A.
A general, enantioselective synthesis of N-alkyl terminal aziridines and C2-functionalized azetidines via organocatalysis
Senter, Timothy J.,O'Reilly, Matthew C.,Chong, Katherine M.,Sulikowski, Gary A.,Lindsley, Craig W.
, p. 1276 - 1279 (2015/03/04)
A short, high-yielding protocol involving the enantioselective α-chlorination of aldehydes has been developed for the enantioselective synthesis of C2-functionalized aziridines and N-alkyl terminal azetidines from a common intermediate. This methodology allows for the rapid preparation of functionalized aziridines in 50-73% overall yields and 88-94% ee, and azetidines in 22-32% overall yields and 84-92% ee. Moreover, we developed a scalable and cost-effective route to the key organocatalyst (54% overall yield, >95% dr).
Asymmetric synthesis of trans-2,5-disubstituted pyrrolidines from enantiopure homoallylic amines. Synthesis of pyrrolidine (-)-197B
Davis, Franklin A.,Song, Minsoo,Augustine, Alexander
, p. 2779 - 2786 (2007/10/03)
Iodocyclization of sulfinimine-derived enantiopure homoallylic sulfonamides affords trans-2,5-disubstituted 3-iodopyrrolidines and represents valuable methodology for the asymmetric synthesis of this important heterocyclic ring system.
Asymmetric synthesis of trans-2,5-diphenylpyrrolidine: A C2-symmetric chiral amine
Chong,Clarke,Koch,Olbach,Taylor
, p. 409 - 418 (2007/10/02)
(R,R)-2,5-Diphenylpyrrolidine of high enantiomeric purity (>98% e.e.) may be prepared from 1,4-diphenyl-1,4-butanedione in 4 steps and 64% overall yield. A key step is asymmetric reduction of the dione with Ipc2BCl.
Diastereoselective addition of chiral imines and 1,3-oxazolidines with Grignard reagents; asymmetric synthesis of (R)-2-aryl- and (R,R)-2,5-bis(aryl)pyrrolidines
Higashiyama, Kimio,Inoue, Hiroaki,Takahashi, Hiroshi
, p. 1083 - 1092 (2007/10/02)
Asymmetric syntheses of (R)-2-aryl- and (R,R)-2,5-bis(aryl)pyrrolidines were described starting from chiral aromatic imines derived from (R)-phenylglycinol, in which the diastereoselective additions of Grignard reagents to the chiral imines and 1,3-oxazol
