42308-20-3Relevant articles and documents
Unbalanced-Ion-Pair-Catalyzed Nucleophilic Fluorination Using Potassium Fluoride
Hammond, Gerald B.,Li, Wangbing,Lu, Zhichao,Xu, Bo
supporting information, p. 9640 - 9644 (2021/12/14)
An unbalanced ion pair promoter (e.g., tetrabutylammonium sulfate), consisting of a bulky and charge-delocalized cation and a small and charge-localized anion, greatly accelerates nucleophilic fluorinations using easy handling KF. We also successfully converted an inexpensive and commercially available ion-exchange resin to the polymer-supported ion pair promoter (A26–SO42–), which could be reused after filtration. Moreover, A26–SO42– can be used in continuous flow conditions. In our conditions, water is well-tolerated.
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.
A transition metal-free approach to a regioselective total synthesis of the natural product derivative 6-methylellipticine, a potent anticancer agent
Lin, Song-Bo,Wang, Wan-Wan,Meng, Jin-Peng,Li, Xi-Wang,Wu, Jun,Sun, Xiao-Ling
supporting information, (2019/11/26)
A transition metal-free and regioselective total synthesis of 6-methylellipticine, a potent anticancer agent, was developed. This synthetic approach mainly involved two key reactions: a direct amination of multi-functional phenol via an alkylation-Smiles