Synthesis and antimicrobial activity of N1-benzyl or N1-benzyloxy-1,6-dihydro-1,3,5-triazine-2,4-diamines
摘要:
The emergence and spread of multidrug-resistant strains of Staphylococcus aureus and Mycobacterium tuberculosis are generating a threat to public health worldwide. In the current study, a series of N-1-benzyl and N-1-benzyloxy-1,6-dihydro-1,3,5-triazine-2,4-diamine derivatives were synthesized and investigated for their antimicrobial activity against S. aureus, and Mycobacterium smegmatis which is taxonomically related to M. tuberculosis. Most of the compounds exhibited good activity against M. smegmatis as determined by comparison of diameters of the zone of inhibition of test compounds and standard antibiotics. Compound 7o showed potent antimycobacterial activity against M. smegmatis without mammalian DHFR inhibition liability. The results from this study indicate that 1-benzyl derivatives of 1,6-dihydro-1,3,5-triazine-2,4-diamines may be used as lead compounds for the discovery of antimycobacterial agents. (C) 2011 Elsevier Ltd. All rights reserved.
Deoxygenative hydroboration of primary, secondary, and tertiary amides: Catalyst‐free synthesis of various substituted amines
作者:Jaeeun Yi、Hyun Tae Kim、Ashok Kumar Jaladi、Duk Keun An
DOI:10.1002/bkcs.12438
日期:2022.1
less reactive functional groups under catalyst-free conditions is an interesting aspect and requires a typical protocol. Herein, we report the synthesis of various primary, secondary, and tertiary amines through hydroboration of amides using pinacolborane under catalyst-free and solvent-freeconditions. The deoxygenative hydroboration of primary and secondary amides proceeded with excellent conversions
Transition metal-free catalytic reduction of primary amides using an abnormal NHC based potassium complex: integrating nucleophilicity with Lewis acidic activation
作者:Mrinal Bhunia、Sumeet Ranjan Sahoo、Arpan Das、Jasimuddin Ahmed、Sreejyothi P.、Swadhin K. Mandal
DOI:10.1039/c9sc05953a
日期:——
potassium complex was used as a transitionmetal-free catalyst for reduction of primary amides to corresponding primary amines under ambient conditions. Only 2 mol% loading of the catalyst exhibits a broad substrate scope including aromatic, aliphatic and heterocyclic primary amides with excellent functional group tolerance. This method was applicable for reduction of chiral amides and utilized for the synthesis
Primary amides to amines or nitriles: a dual role by a single catalyst
作者:Hari S. Das、Shyamal Das、Kartick Dey、Bhagat Singh、Rahul K. Haridasan、Arpan Das、Jasimuddin Ahmed、Swadhin K. Mandal
DOI:10.1039/c9cc05856g
日期:——
of various primary amides to amines (25 examples). On simple modification of the reaction conditions such as in the presence of a catalytic amount of secondary amide, the same catalyst can transform the primary amides into intermediate nitrile compounds (16 examples) in excellent yields. This is the first example where such a controlled catalytic transformation of primary amides to amines or nitriles
Transfer Hydrogenation of Ketones, Nitriles, and Esters Catalyzed by a Half-Sandwich Complex of Ruthenium
作者:Sun-Hwa Lee、Georgii I. Nikonov
DOI:10.1002/cctc.201402780
日期:2015.1
Half‐sandwich complexes [Cp(PiPr3)Ru(CH3CN)2]PF6 (1; Cp=cyclopentadienyl) and [Cp*(phen)Ru(CH3CN)]PF6 (2; Cp*=pentamethylcyclopentadienyl, phen=phenanthroline) catalyse the transferhydrogenation of ketones to alcohols, aldimines to amines, and nitriles to imines under mild conditions. In the latter process, the imine products come from the coupling of the amines formed initially with acetone derived
Optimum bifunctionality in a 2-(2-pyridyl-2-ol)-1,10-phenanthroline based ruthenium complex for transfer hydrogenation of ketones and nitriles: impact of the number of 2-hydroxypyridine fragments
作者:Bhaskar Paul、Kaushik Chakrabarti、Sabuj Kundu
DOI:10.1039/c6dt01961g
日期:——
A rare example of a highly active bifunctional Ru(ii) catalyst containing only one 2-hydroxypyridine (2-HP) unit is presented which exhibited exceptionally high catalytic activity in transfer hydrogenation of ketones and nitriles.