Indian Journal of Chemistry

Transcription

1 585 Website address: Indian Journal of Chemistry Sect. B: rganic Chemistry including Medicinal Chemistry VL. 53B UMBER 5 May 2014 Papers 591 Synthesis and characterization of triad based rigid mesogenic diols derived from hydroquinone and 4-hydroxybenzoic acid Khudbudin B Mulani, itin V Ganjave & ayaku Chavan* Polymer Science and Engineering Division, CSIR-ational Chemical Laboratory, Pashan Road, Pune , India 597 Design, synthesis and anticonvulsant activity of some newer 3H-quinazolin-4-one derivatives A series of 2-[2-(aryl)-2-oxo-ethylsulfanyl]-3-(aryl/propyl)-3Hquinazolin-4-ones 2a-u have been synthesized and tested for their potential against seizures in mice. All the newly synthesized compounds show moderate to high protection against 6 Hz partial seizure with compound 2b, 2-(2-oxo-2-p-tolyl-ethylsulfanyl)-3- phenyl-3h-quinazolin-4-one emerging as the most active anticonvulsant agent endowed with neuroprotective effect against MDA and kainate induced excitotoxicity. The results of whole brain GABA assay indicate that the seizure protective activity of 2b can be either due to the increased brain GABA level or due to neuroprotective action. R 2 S 2a-u Mohd Amir*, Israr Ali & Mohd Zaheen Hassan Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Hamdard University, ew Delhi , India IDIA J CHEM, 53B (5)2014

2 An aqua mediated facile synthesis of conformationally restricted polycyclic dihydropyridines An economically and environmentally benign synthesis of 4- substituted-dihydropyridines (DHPs) is described from readily accessible 4-hydroxy coumarin with aldehydes and ammonium nitrate that are accelerated by exposure to microwaves. The reaction completes within a few minutes with good yields. The mechanistic detail of methodology includes Michael type addition of β-aminobenzopyran-2-one across the double bond of arylidine formed by the condensation of 4-hydroxycoumarin with aldehyde in aq. medium. The main advantages of the protocol reported here is absence of use of strong acid or expensive catalyst, good yields, easy work-up and almost no effluent generation. + RCH + H 4 3 µν water H 1 2a-m 3 H R 4a-m Mazaahir Kidwai*, Shuchi Kukreja, Shweta Rastogi, Kavita Singhal & eeraj Kumar Mishra Green Chemistry Research Laboratory, Department of Chemistry, University of Delhi, Delhi , India 610 Microemulsion technique for the novel synthesis of deferasirox using metal mediated coupling H Chan-Lam coupling Suzuki Coupling H H Hydrolysis H H H Deferasirox Bhairab ath Roy*, Girij Pal Singh, Shaji K George, Piyush S Lathi, Manoj K Agrawal, Anurag Trivedi, Madhan Mishra & Gajendra Singh Process Research Group, Lupin Research Park, Lupin Ltd, Survey o 46/A & 47/A, ande Village, Mulshi Taluka, Pune , India IDIA J CHEM, 53B (5)2014

3 Synthesis, computational study, configurational analysis and biological activity of imidazolidinone, thiazolidinone and isoxazolone derivatives of 1,2-naphthoquinone The synthesis of new bioactive molecules by Knoevenagel condensation of 1,2-naphthoquinone with active methylene heterocycles is described. The configuration of products has been investigated by DFT quantum calculations. Some of the products showed significant antimicrobial activity. R T Pardasani*, Anita Prashant & Kusum Sharma Department of Chemistry, Central University of Rajasthan, Bandarsindari , India otes 625 An efficient and green synthesis of pyrazolophthalazinyl spirooxindoles using task specific ionic liquid An environmentally benign approach for the synthesis of pyrazolophthalazinyl spirooxindoles has been developed with the help of a task-specific ionic liquid [DBU][AcH], which plays the dual role of catalyst as well as reaction medium. The advantages of this method include the use of green reaction conditions, no organic solvent, easy work-up, excellent yields and recyclability of the ionic liquid. Kumkum Kumari, Rahul Singh & Krishna and Singh* Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi , India IDIA J CHEM, 53B (5)2014

4 A simple acetylation of alcohols using Zn nanopowder synthesized by microwave irradiation R H Zn nanopowder + H Reflux, 3 h 23-93% 1, 2, 3,Bn R + H 2 Mohammad Javaherian* & Hashem Eskandari Sabzi Department of Chemistry, College of Science, Shahid Chamran University of Ahvaz, Iran 635 Preparation of carbazole and dibenzofuran derivatives by selective bromination on aromatic rings or benzylic groups with -bromosuccinimide ovel carbazole and dibenzofuran derivatives were synthesized by selective bromination on aromatic rings or benzylic groups with BS. Lei Fang*, Haun Zhang, Xubin Fang, Shaohua Gou & Lin Cheng Pharmaceutical Research Center and Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, anjing , China IDIA J CHEM, 53B (5)2014

5 Synthesis of some new imidazole-2-thiols and their derivatives as potent antimicrobial agents H SH R 2 SH SH 3a-c 4a-c, 5a-c, 6a-c 7a-c Amol K Dhawas* & Suresh S Thakare Postgraduate Department of Chemistry, Shri Shivaji Science College, Amravati , India 647 Cytotoxicity of 6-acetonyldihydrochelerythrin, arnottianamide and 6-(2-hydoxypropyl)- dihydrochelerythrine towards human cancer cell lines 6-Acetonyldihydrochelerythrin and arnottianamide have been isolated for the first time from conical prickles on the stem bark of Zanthoxylum rhetsa (Roxb.) DC. Reduction of 6-acetonyldihydrochelerythrin gave 6-(2-hydoxypropyl)-dihydrochel-erythrine. These compounds have been investigated for their cytotoxicity against seven cancer cell lines of various origins. M Sreelekha, P Anto, R J Anto & P M Shafi* Department of Chemistry, University of Calicut, Calicut , India Authors for correspondence are indicated by (*) IDIA J CHEM, 53B (5)2014