98464-65-4Relevant academic research and scientific papers
Synthesis of 1-Pyrroline by Denitrogenative Ring Expansion of Cyclobutyl Azides under Thermal Conditions
Ban, Kazuho,Miki, Yuya,Sajiki, Hironao,Sawama, Yoshinari,Tomita, Naohito
, p. 3481 - 3484 (2021/06/17)
We herein report an efficient and systematic synthesis of 1-pyrrolines from cyclobutyl azides under thermal and neutral conditions. The reaction proceeded without any additional reagents, and nitrogen was generated as the sole by-product. Furthermore, the generated 1-pyrrolines could be continuously transformed into pyrroles, N-Boc-amines, and oxaziridines in an one-pot manner. (Figure presented.).
Intramolecular Csp3-H/C-C bond amination of alkyl azides for the selective synthesis of cyclic imines and tertiary amines
Jiao, Ning,Li, Xinyao,Luo, Xiao,Song, Song,Wang, Weijin,Wen, Xiaojin
, p. 4482 - 4487 (2020/05/18)
The intramolecular Csp3-H and/or C-C bond amination is very important in modern organic synthesis due to its efficiency in the construction of diversified N-heterocycles. Herein, we report a novel intramolecular cyclization of alkyl azides for the synthesis of cyclic imines and tertiary amines through selective Csp3-H and/or C-C bond cleavage. Two C-N single bonds or a CN double bond are efficiently constructed in these transformations. The carbocation mechanism differs from the reported metal nitrene intermediates and therefore enables metal-free and new transformation.
Enantioselective Imine Reduction Catalyzed by Phosphenium Ions
Lundrigan, Travis,Welsh, Erin N.,Hynes, Toren,Tien, Chieh-Hung,Adams, Matt R.,Roy, Kayelani R.,Robertson, Katherine N.,Speed, Alexander W. H.
, p. 14083 - 14088 (2019/10/11)
The first use of phosphenium cations in asymmetric catalysis is reported. A diazaphosphenium triflate, prepared in two or three steps on a multigram scale from commercially available materials, catalyzes the hydroboration or hydrosilylation of cyclic imin
Palladium-catalyzed ortho-olefination of 2-arylpyrrolidines: A tool for increasing structural complexity in nitrogen heterocycles
Legarda, Pablo D.,García-Rubia, Alfonso,Arrayás, Ramón Gómez,Carretero, Juan C.
, p. 3947 - 3954 (2018/06/11)
The dual role of the (2-pyridyl)sulfonyl unit as directing functionality and readily removable N-protecting group has enabled an efficient and practical transformation of 2-arylpyrrolidine derivatives into more complex tricyclic frameworks via palladium-catalyzed ortho-olefination with electron deficient alkenes and subsequent cyclization upon N-deprotection under mild conditions. The key cross coupling step in the presence of N-fluoro-2,4,6-trimethylpyridinium triflate ([F+]) as the terminal oxidant is both highly efficient and tolerant to a variety of steric and electronic changes at both coupling partners. By adequate choice of reductive conditions, the N-sulfonyl deprotection can be directed to the selective formation of benzo-fused pyrrolizidine or fused pyrrolidino-benzazapine frameworks.
AROMATIC HETEROCYCLIC DERIVATIVE AND PHARMACEUTICAL
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Paragraph 0116, (2015/04/15)
The main purpose of the invention is to provide a novel aromatic heterocyclic derivative or a pharmaceutically acceptable salt thereof. Examples of the invention include aromatic heterocyclic derivatives represented by general formula [1] and pharmaceutically acceptable salts thereof. In formula [1], R1 represents phenyl optionally substituted with one or two groups selected from the group consisting of halogens ,as well as alkyls and alkoxys optionally substituted by halogens; R2 represents a hydrogen, an alkyl, cycloalkyl, or alkoxy optionally substituted by a halogen, or a heteroaryl optionally substituted by an alkyl; X represents CR3, and Y represents N or CR4, or X represents N, and Y represents CR4; and Z represents CR5 or N.
Highly effective asymmetric hydrogenation of cyclic N -alkyl imines with chiral cationic Ru-MsDPEN catalysts
Chen, Fei,Ding, Ziyuan,Qin, Jie,Wang, Tianli,He, Yanmei,Fan, Qing-Hua
supporting information; experimental part, p. 4348 - 4351 (2011/10/13)
A range of cyclic N-alkyl imines were efficiently hydrogenated by using a chiral cationic Ru(η6-cymene)(MsDPEN)(BArF) complex (MsDPEN = N-(methanesulfonyl)-1,2-diphenylethylenediamine) in high yields and up to 98% ee. A one-pot synthesis of chiral 2-phenylpyrrolidine via reductive amination was also developed.
Iridium-catalyzed enantioselective hydrogenation of cyclic imines
Chang, Mingxin,Li, Wei,Hou, Guohua,Zhang, Xumu
supporting information; experimental part, p. 3121 - 3125 (2011/02/22)
A catalytic complex made from [Ir(COD)Cl]2 [di-μ-chloro- bis(1,5-cyclooctadiene)diiridium(I)] precursor and (S,S)-f-Binaphane ((R,R)-1,1′-bis{(R)-4,5-dihydro-3H-dinaphtho[1,2-c:2′,1′-e] phosphepino}ferrocene) ligand effectively catalyzed the en
SUBSTITUTED N-ARYLPYRROLIDINES AS SELECTIVE ANDROGEN RECEPTOR MODULATORS
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Page/Page column 50-51, (2010/11/25)
The present invention provides a compound of the formula: Formula I or a pharmaceutically acceptable salt thereof; pharmaceutical compositions comprising an effective amount of a compound of Formula I in combination with a suitable carrier, diluent, or excipient; and methods for treating physiological disorders, particularly frailty, osteoporosis, osteopenia, and male and female sexual dysfunction comprising administering to a patient in need thereof an effective amount of a compound of Formula I.
SYNTHESIS OF ARYLIMINES FROM N-SILYLAMIDES AND ARYLLITHIUM COMPOUNDS
Feringa, Ben L.,Jansen, F. G. A.
, p. 507 - 508 (2007/10/02)
Various arylimines were synthesized by the addition of N-silylated-N-alkyl- or N-aryl-amides to aryllithium compounds.
