3351-93-7Relevant academic research and scientific papers
Comparative conventional and microwave assisted synthesis of heterocyclic oxadiazole analogues having enzymatic inhibition potential
Javid, Jamila,Aziz-ur-Rehman,Abbasi, Muhammad A.,Siddiqui, Sabahat Z.,Iqbal, Javed,Virk, Naeem A.,Rasool, Shahid,Ali, Hira A.,Ashraf, Muhammad,Shahid, Wardah,Hussain, Safdar,Ali Shah, Syed A.
, p. 93 - 110 (2020/10/06)
A comparative microwave assisted and conventional synthetic strategies were applied to synthesize heterocyclic 1,3,4-oxadiazole analogues as active anti-enzymatic agents. Green synthesis of compound 1 was achieved by stirring 4-methoxybenzenesulfonyl chloride (a) and ethyl piperidine-4-carboxylate (b). Compound 1 was converted into respective hydrazide (2) by hydrazine and then into 1,3,4-oxadiazole (3) by CS2 on reflux. The electrophiles, N-alkyl/aralkyl/aryl-2-bromopropanamides (6a–p) were synthesized and converted to N-alkyl/aralkyl/aryl-2-propanamide derivatives (7a–p) by reaction with 3 under green chemistry. Microwave assisted method was found to be effective relative to conventional method. 13C-NMR, 1H-NMR and IR techniques were availed to corroborate structures of synthesized compounds and then subjected to screening against lipoxygenase (LOX), α-glucosidase, acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) enzymes. A number of compounds presented better potential against these enzymes. The most active compounds against LOX and α-glucosidase enzymes were subjected to molecular docking study to explore their interactions with the active sites of the enzymes.
Microwave-assisted synthesis of triazole derivatives conjugated with piperidine as new anti-enzymatic agents
Abbasi, Muhammad A.,Ali Shah, Syed A.,Htar, Thet T.,Iqbal, Javed,Khalid, Hira,Khan, Shafi U.,Laulloo, Sabina J.,Rasool, Shahid,Rehman, Aziz-ur-,Siddiqui, Sabahat Z.,Virk, Naeem A.
, (2020/01/25)
The current study was aimed for the study of piperidine-based triazole compounds for their biological potential against various enzymes. A novel library of compounds, 9a-r, having piperidine, 1,2,4-triazole, and propanamides was synthesized through consecutive steps including the formation of sulfonamide, hydrazide, 1,2,4-triazole, and thio-ether. Initially, 4-methoxybenzenesulfonyl chloride (1) and ethyl isonipecotate (2) were utilized to develop ethyl 1-(4-methoxyphenylsulfonyl)-4-piperidinecarboxylate (3). The product 3 was converted into respective hydrazide (4) which was further cyclized into 1,2,4-triazole (5) nucleus. A series of propanamides, 8a-r, were synthesized from different amines, 6a-r. These electrophiles, 8a-r, were reacted with compound 5 under conventional and microwave-assisted protocols to acquire the library of hybrids, 9a-r. The structural confirmations were availed by 1H-NMR, 13C-NMR, and IR techniques. The whole series was evaluated for biological potential against acetylcholinesterase (AChE) and α-glucosidase enzymes. The biological evaluation ranges low to high in potential for different compounds based on the structural variations of synthesized compounds. Almost all the compounds remained active against both the enzymes except a few ones. The bovine serum albumin (BSA) binding study demonstrated the flow of drug in the body, and the docking study explained the interactions responsible for active behavior of synthesized compounds.
Mild and phosphine-free iron-catalyzed cross-coupling of nonactivated secondary alkyl halides with alkynyl grignard reagents
Cheung, Chi Wai,Ren, Peng,Hu, Xile
supporting information, p. 2566 - 2569 (2014/05/20)
A simple protocol for iron-catalyzed cross-coupling of nonactivated secondary alkyl bromides and iodides with alkynyl Grignard reagents at room temperature has been developed. A wide range of secondary alkyl halides and terminal alkynes are tolerated to a
Process for the preparation of α-aminoacylanilides
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, (2008/06/13)
A novel process for the preparation of α-aminoacylanilides comprises the treatment of the corresponding α-haloacylanilides with a solution of ammonium carbamate in aqueous ammonia. The process is especially useful in the preparation of certain active cardiac antiarrhythmic agents, such as tocainide.
