41593-98-0Relevant articles and documents
Reductive Amination Revisited: Reduction of Aldimines with Trichlorosilane Catalyzed by Dimethylformamide─Functional Group Tolerance, Scope, and Limitations
Campbell, Joanna L. P.,Davies, Christopher D.,Ho?ek, Jan,Ko?ovsky, Pavel,Kysilka, Ond?ej,Popov, Kirill K.,Pour, Milan
, p. 920 - 943 (2022/01/27)
Aldimines, generated in situ from aliphatic, aromatic, and heteroaromatic aldehydes and aliphatic, aromatic, and heteroaromatic primary or secondary amines, can be reduced with trichlorosilane in the presence of dimethylformamide (DMF) as an organocatalys
Design, synthesis and biological evaluation of new 1,3-thiazole derivatives as potential anti-inflammatory agents
Modri?, Marina,Bo?i?evi?, Marin,Faraho, Ivan,Bosnar, Martina,?kori?, Irena
, (2021/05/06)
Thiazoles are widely recognized as nuclei of great value for obtaining molecules with various biological activities, including analgesic, anti-inflammatory, anti-HIV, antidiabetic, antitumor and antimicrobial. A library of 26 thiazole derivatives as fragments were designed, synthesized and evaluated for their anti-inflammatory activities. Some screened compounds showed promising results and were found to be potent in the series by inhibiting LPS-induced TNFα and IL-8 release with IC50 values in μM range without cytotoxic activity.
Sulfated polyborate: A dual catalyst for the reductive amination of aldehydes and ketones by NaBH4
Ganwir, Prerna,Chaturbhuj, Ganesh
, (2021/05/19)
An efficient, quick, and environment-friendly one-pot reductive amination of aldehydes or ketones was developed. In ethanol at 70 °C, a imination catalyzed by sulfated polyborate and further reduced by sodium borohydride yields various amines. The present method has many significant benefits, including a shorter reaction time, excellent yields, and a hassle-free, straightforward experimental process. The reaction has a wide range of applications due to its flexibility, including secondary amine for reductive amination.
Copper-catalyzed one-pot coupling reactions of aldehydes (ketones), tosylhydrazide and 2-amino(benzo)thiazoles: An efficient strategy for the synthesis of N-alkylated (benzo)thiazoles
Xie, Zengyang,Chen, Ruijiao,Ma, Mingfang,Kong, Lingdong,Liu, Jun,Wang, Cunde
, (2019/08/16)
An efficient and practical C–N bond formation methodology for the synthesis of N-alkylated (benzo)thiazoles was developed, via the copper-catalyzed one-pot two-step reactions of 2-amino(benzo)thiazoles and aldehydes (ketones) with tosylhydrazide. This cross-coupling reaction proceeded smoothly and tolerated a broad range of functional groups (46 examples). A variety of functionalized N-alkylated (benzo)thiazoles were obtained in moderate to high yields. Notably, gram-scale synthesis of fanetizole (anti-inflammatory drug) was also realized through this protocol.
Pd-PEPPSI-IPentAn Promoted Deactivated Amination of Aryl Chlorides with Amines under Aerobic Conditions
Huang, Fei-Dong,Xu, Chang,Lu, Dong-Dong,Shen, Dong-Sheng,Li, Tian,Liu, Feng-Shou
, p. 9144 - 9155 (2018/07/21)
We report herein a highly efficient Pd-catalyzed amination by "bulky-yet-flexible" Pd-PEPPSI-IPentAn complexes. The relationship between the N-heterocyclic carbenes (NHCs) structure and catalytic properties was discussed. Sterically hindered (hetero)aryl chlorides and a variety of aliphatic and aromatic amines can be applied in this cross-coupling, which smoothly proceeded to provide desired products. The operationally simple protocol highlights the rapid access to CAr-N bond formation under mild conditions without the exclusion of air and moisture.
Ligand-free Iron(II)-Catalyzed N-Alkylation of Hindered Secondary Arylamines with Non-activated Secondary and Primary Alcohols via a Carbocationic Pathway
Nayal, Onkar S.,Thakur, Maheshwar S.,Kumar, Manoranjan,Kumar, Neeraj,Maurya, Sushil K.
supporting information, p. 730 - 737 (2017/12/26)
Secondary benzylic alcohols represent a challenging class of substrates for N-alkylation of amines. Herein, we describe an iron(II)-catalyzed eco-friendly protocol for N-alkylation of secondary arylamines with secondary benzyl alcohols through a carbocationic pathway instead of the known borrowing hydrogen transfer (BHT) approach. Transiently generated carbocations, produced from alcohols via self-condensation, were coupled with arylamines to provide highly functionalized amine products. The scope of this methodology involves N-alkylation of primary, secondary and heterocyclic amines with primary/secondary benzylic, allylic and heterocyclic alcohols, which are common key structures in numerous pharmaceuticals drugs. The method can also be easily adopted for the amination of various natural products. (Figure presented.).
Direct Reductive Amination of Aldehydes via Environmentally Benign Bentonite-Gold Nanohybrid Catalysis
Maya,Poulose, Susanna,John, Jubi,Luxmi Varma
, p. 1177 - 1184 (2017/04/11)
An efficient, green and reliable method for the direct reductive amination of aldehydes was developed using an environmentally benign bentonite-gold nanohybrid catalyst. Use of this heterogeneous catalyst affords a variety of secondary amines in excellent yield under ambient reaction conditions in the presence of phenyldimethylsilane as mild hydride donor. The catalyst is recyclable, selective and is well applicable for the gram-scale preparation of secondary amines. (Figure presented.).
Synthesis of tertiary arylamines: Lewis acid-catalyzed direct reductive: N -alkylation of secondary amines with ketones through an alternative pathway
Nayal, Onkar S.,Thakur, Maheshwar S.,Bhatt, Vinod,Kumar, Manoranjan,Kumar, Neeraj,Singh, Bikram,Sharma, Upendra
supporting information, p. 9648 - 9651 (2016/08/04)
We report herein a highly efficient, tin(ii)/PMHS catalyzed reductive N-alkylation of arylamines with ketones affording tertiary arylamines. A very wide substrate scope was observed for the current catalytic method as all six permutations of ketones/aldehydes/heterocyclic carbonyls and primary/secondary/heterocyclic amines were well tolerated, enabling access to secondary, tertiary and heterocyclic amines. The method is also convenient for the synthesis of N-substituted isoindolinones and phthalazinones via a tandem amination-amidation sequence. Mechanistic investigations revealed a carbocationic pathway instead of an ordinary direct reductive amination pathway.
Synthesis of (hetaryl)alkylamines from the reactions of 2-aminopyrimidine, 2-aminothiazole, and 2-aminothiazoline with benzyl bromide and xylylene dibromides
Gondi, Sudershan R.,Son, David Y.
, p. 401 - 410 (2008/04/01)
Alkylation reactions of 2-aminopyrimidine, 2-aminothiazole, 2-aminothiazoline, and their Cbz-protected derivatives are described. Reactions with benzyl bromide proceed to give monoalkylated products with 2-aminopyrimidine and 2-aminothiazole, but 2-aminot
HETEROCYCLIC COMPOUNDS AS POSITIVE MODULATORS OF METABOTROPIC GLUTAMATE RECEPTOR 2 (MGLU2 receptor)
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Page/Page column 47, (2009/01/20)
The present invention relates to heterocyclic compounds which are positive modulators of metabotropic glutamate receptor. The present invention also relates to the use of these compounds for preparing a pharmaceutical composition and to a method of treati