Indian Journal of Chemistry

Transcription

1 889 Website address: Indian Journal of Chemistry ct. B: rganic Chemistry including Medicinal Chemistry VL. 52B UMBE 7 July 2013 Papers 895 A facile synthesis of /C-terminal selenourea tethered glycosylated amino acids A new class of neoglycosylated amino acids possessing a selenourea moiety is synthesized by the coupling of α-isoselenocyanato esters or Cbz/Boc-amino alkyl isoselenocyanates with peracetyl/benzoylated glucosylamine. The protocol has been extended for the synthesis of selenourea tethered neoglycosyl amino acids with orthogonal protecting groups. 2 + C CY 2 Pg Bz Bz Bz Bz TF, rt 1-2hr examples CMe CY 3 Pg 5 6 examples Vommina V Sureshbabu*, B Vasantha & C Madhu 6 2 examples 7 2 examples Peptide esearch Laboratory, Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B.. Ambedkar Veedhi, Bangalore , India 901 Antimycobacterial agent, (E)-phytol and lauric amide from the plant Lagascea mollis Asish K Bhattacharya* & Kalpeshkumar C ana atural Product Chemistry Laboratory, Division of rganic Chemistry, CSI-ational Chemical Laboratory, Dr. omi Bhabha oad, Pune , India IDIA J CEM, 52B (7) 2013

2 Microwave assisted synthesis of new coumarin based 3-cyanopyridine scaffolds bearing sulfonamide group having antimicrobial activity -(3-Cyano-6-(6-fluoro-2-oxo-2-chromen-3-yl)-4-(4-aryl)pyridin- 2yl)benzene sulfonamides 7a-m have been synthesized by classical as well as microwave assisted method and these compounds have been screened for their antimicrobial activity. C Desai*, M Satodiya, K M ajpara, V V Joshi & V Vaghani Division of Green Chemistry, Department of Chemistry, DST-FIST Sponsored Department, Maharaja Krishnakumarsinhji Bhavnagar University, Mahatma Gandhi Campus, Bhavnagar , India 915 An efficient L-proline catalyzed four-component synthesis of β-acetamido ketones and esters An environmentally benign synthesis of β-acetamido carbonyl compounds has been achieved in high yields by one-pot multicomponent condensation of aryl aldehyde, acetyl chloride, acetonitrile/benzonitrile and enolisable ketone/ester in the catalytic presence of L-proline. eetu Singh, Satish Kumar Singh & Krishna and Singh* Department of Chemistry [Centre of Advanced Study], Faculty of Science, Banaras indu University, Varanasi , India IDIA J CEM, 52B (7) 2013

3 Synthesis of new antifungal 1,2,4-bis-oxadiazolines using cycloaddition reaction of nitrile oxide with bis- Schiff base ,3-dipolar cycloaddition Ahmed Toumi, Mejda Daami-emadi & ichem Ben Jannet* Laboratoire de Chimie étérocyclique, Produits aturels et éactivité (CP), Equipe Chimie Bioorganique et Produits aturels, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir, Avenue de l Environnement, 5019 Monastir, Tunisia 929 Cadmium-proline catalyzed direct asymmetric Michael and Aldol reactions in water The cadmium-proline complex has been used in direct asymmetric Michael and aldol reactions in water at room temperature. The chiral catalyst has been easily prepared from commercially available L-proline. Moreover, the catalyst has been readily recovered and reused for at least five times without a significant loss of catalytic activity or stereoselectivity. Cd 2+ 2 (7.5 mol %) 2, rt Ph 2 Ph 2 Yields up to 94%; ee up to 89% C Yields up to 100%; ee up to 83% Bhavna Thingom, Soniya D Moirangthem & Warjeet S Laitonjam* Department of Chemistry, Manipur University, Canchipur , India IDIA J CEM, 52B (7) 2013

4 Proline catalyzed enantioselective Michael additions of unmodified ketones to arylidines + Ph C C 2 Me, rt Ph C imalini Moirangthem, Bhavna Thingom, Soniya D Moirangthem & Warjeet S Laitonjam* Department of Chemistry, Manipur University, Canchipur , India otes 942 Synthesis of some new oxazolinyl/thiazolinyl/imidazolinyl- benzoxazoles, benzothiazoles and benzimidazoles A new class of oxazolinyl/thiazolinyl/imidazolinyl-benzoxazoles/benzothiazoles/benzimidazoles have been prepared by exploiting the respective heterocyclic sulfonyl acetic acid methyl ester functionality with different nucleophiles using samarium(iii) chloride. X X S Y 1 / 2 / , 13, 16, 19; X = 2, 14, 17, 20; X = S 3, 15, 18, 21; X = 13, 14, 15; Y = 16, 17, 18; Y = S 19, 20, 21; Y = D enaiah, B C Venkatesh, A Padmaja & V Padmavathi* Department of Chemistry, Sri Venkateswara University, Tirupati , India IDIA J CEM, 52B (7) 2013

5 aisen-schmidt condensation in solvent-free conditions via the use of microwave irradiation and pestle/mortar F A high yielding and rapid method of aisen-schmidt condensation of 2-(4-acetylphenylamino)-3-(4-fluorophenyl)-1,8-naphthyridine 3 with various aromatic aldehydes in the presence of solid K in combination with microwave irradiation and also with a pestle and mortar under solvent-free conditions affords 2-(4-cinnamoylphenylamino)-3-(4-fluorophenyl)-1,8-naphthyridines (chalkones or α, β-unsaturated ketones) 4 is described. F -C solid K MW or pestle/mortar K Mogilaiah*, A Vinay Chandra & D Praveena 3 4 Department of Chemistry, Kakatiya University, Warangal , India 953 ew biologically active allelochemical from seeds of Cassia absus Linn. A new bioactive allelochemical 1, m.p C, m.f. C , [M] (FABMS), has been isolated from methanolic extract of the seeds of Cassia absus Linn. alongwith two known compounds 3, 5, 7, 4 -tetrahydroxy-2, 5 -dimethoxy flavone and Luteolin. The structure of a new compound has been characterized as 5, 7, 4 - trihydroxy-8,3 -dimethoxyflavone-5--α-l-rhamnopyranosyl-7- -β-d-xylopyranosyl-(1 4)--β-D-galactopyranoside by various colour reactions, spectral analysis and chemical degradations. C 3 C 3 3 C Yadava* & Umesh Kumar Vishwakarma atural Products Laboratory, Department of Chemistry, Dr.. S. Gour University, Sagar , India Authors for correspondence are indicated by (*) IDIA J CEM, 52B (7) 2013