A One-Pot Process for the Enantioselective Synthesis of Amines via Reductive Amination under Transfer Hydrogenation Conditions
摘要:
Cyclic amines may be prepared via a sequence of deprotection followed by intramolecular reductive amination of t-Boc-protected amino ketones under asymmetric transfer hydrogenation conditions. In cases where the corresponding imine reaction proceeds with high enantioselectivity, this is reflected in the one-step process.
Diversification of Unprotected Alicyclic Amines by C−H Bond Functionalization: Decarboxylative Alkylation of Transient Imines
作者:Anirudra Paul、Jae Hyun Kim、Scott D. Daniel、Daniel Seidel
DOI:10.1002/anie.202011641
日期:2021.1.18
efforts by many practitioners in the field, methods for the direct α‐C−H bond functionalization of unprotected alicyclic amines remain rare. A new advance in this area utilizes N‐lithiated alicyclic amines. These readily accessible intermediates are converted to transient imines through the action of a simple ketone oxidant, followed by alkylation with a β‐ketoacid under mild conditions to provide valuable
A Selenourea-Thiourea Brønsted Acid Catalyst Facilitates Asymmetric Conjugate Additions of Amines to α,β-Unsaturated Esters
作者:Yingfu Lin、William J. Hirschi、Anuj Kunadia、Anirudra Paul、Ion Ghiviriga、Khalil A. Abboud、Rachael W. Karugu、Mathew J. Vetticatt、Jennifer S. Hirschi、Daniel Seidel
DOI:10.1021/jacs.9b12457
日期:2020.3.25
enantioselectivity via the conjugate addition of cyclic amines to unactivated α,β-unsaturated esters. A related strategy enables the kineticresolution of racemic cyclic 2-arylamines, using benzyl acrylate as the resolving agent. Reactions are facilitated by an unprecedented selenourea-thiourea organocatalyst. As elucidated by DFT calculations and 13C kinetic isotope effects studies, the rate-limiting and enantiodetermining
[EN] 3-CYANOQUINOLINES,3-CYANO-1,6-NAPHTHYRIDINES, AND 3-CYANO-1,7-NAPHTHYRIDINES AS PROTEIN KINASE INHIBITORS<br/>[FR] 3-CYANOQUINOLINES,3-CYANO-1,6-NAPHTHYRIDINES ET 3-CYANO-1,7-NAPHTHYRIDINES UTILISEES COMME INHIBITEURS DE PROTEINEKINASE
申请人:AMERICAN HOME PROD
公开号:WO2001072711A1
公开(公告)日:2001-10-04
Compounds of Formula (I), having the structure or a pharmaceutically salt thereof are useful as antineoplastic agents and in the treatment of osteoporosis and polycystic kidney disease.
具有结构式(I)或其药物盐的化合物在抗肿瘤药物和治疗骨质疏松症和多囊肾病方面是有用的。
Palladium‐Catalyzed Arylation of Endocyclic 1‐Azaallyl Anions: Concise Synthesis of Unprotected Enantioenriched <i>cis</i>‐2,3‐Diarylpiperidines
Unprotected cis-2,3-diarylpiperidines are synthesized from readily available piperidines in only three operations. The key step is a palladium-catalyzed cross-coupling reaction between aryl halides and endocyclic 1-azallyl anions, elusive intermediates derived from the in situ deprotonation of 2-aryl-1-piperideines. This cross-coupling reaction can be achieved enantioselectively with a chiral mono-phosphine
Secondary alicyclicamines are converted into their corresponding ring-fused imidazoles in a simple procedure consisting of oxidative imine formation followed by a van Leusen reaction. Amines with an existing α-substituent undergo regioselective ring-fusion at the α′-position. This method was utilized in a synthesis of fadrozole.