http://nopr.niscpr.res.in/handle/123456789/1388 2026-10-06T19:18:59Z http://nopr.niscpr.res.in/handle/123456789/3851 Title: Synthesis of p-tert-butylcalix[8]arene ether derivatives Authors: Yi, Jianmin; Tang, Kewen; Huang, Saijin; Huang, Kelong Abstract: Octaalkylethers 2a-g (alkyl: n-CH₃, n-C₂H₅, n-C₃H₇, n-C₄H₉, n-C₅H₁₁, n-C₆H₁₃, n-C₈H₁₇) of p-tert-butylcalix[8]arene were prepared by the etheration with NaH as base. The structures of the new compouds were determined by IR, ¹H NMR, elemental analysis and MS spectra. and the study for their application is under way. Page(s): 1435-1437 2008-09-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/3850 Title: Dynamic ¹H NMR study of rotational energy barrier around the aryl-nitrogen single bond in γ-spiroiminolactones derived from reaction between 2,6-dimethylphenyl isocyanide and dialkyl acetylenedicarboxylates in the presence of phendione Authors: Maghsoodlou, Malek Taher; Marandi, Ghasem; Khorassani, Mostafa Habibi; Saghatforoush, Lotfali; Aminkhani, Ali; Kabiri, Roya Abstract: The Dynamic effects are observed in ¹H NMR spectra of highly functional γ-spiroiminolactones such as dimethyl-5-(2,6-dimethylphenylimino)-6'-oxo-5H,6H'-spiro[furan-2,5'-[1,10]-phenanthroline]-3,4-dicarboxylate and di-tert-butyl-5-(2,6-dimethylphenylimino)-6'-oxo-5H, 6H'-spiro[furan-2, 5'-[1,10]phenanthroline]-3,4-dicarboxylate. The calculated free-energy of activation (ΔG^≠) for restricted rotation around the aryl-nitrogen single bonds in γ-spiroiminolactones 4a and 4b amounts to (44.4 and 45.3)±2 kJ.mol^-1 with first order rate constant (k=109.9 and 111.0 s^-1) at appropriate temperature respectively. Page(s): 1151-1153 2008-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/3848 Title: Two new neolignan glycosides from Pteris multifida Poir Authors: Xu-dong, Zheng; Hao-bin, Hu; Huai-sheng, Hu Abstract: Two new neolignan glycosides, named as multifidoside A 1 and B 2, together with four known compounds have been isolated from the roots of Pteris multifida Poir. The structures of multifidoside A and B have been characterized by spectroscopic and chemical means as (7S, 8S)-Δ^7′-2,9′-dihydroxy-5′-methoxy-7,3′-dioxy-8,4′-neolignan-4-O-β-D-apiofuranosyl-(1→6)-β-D-gluco¬pyranoside and (7S, 8S)-Δ^7′-2,9,9′-trihydroxy-7,3′-dioxy-8,4′-neolignan-4-O-β-D-apiofuranosyl-(1→6)-β-D-glucopyranoside. The known compounds are identified by comparing their spectral data with those of authentic samples or data reported in the literature. Page(s): 773-777 2008-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/3846 Title: Synthesis of some new 2-(4-alkylthiophenoxy)-4-substituted-1, 3-thiazoles as possible anti-inflammatory and antimicrobial agents Authors: T, Karabasanagouda; Adhikari, Airody Vasudeva; Dhanwad, Ramgopal; Parameshwarappa, G Abstract: A series of new 2-{[4-(alkylthio)phenoxy]methyl}-4-substi¬tuted-1,3-thiazoles 4a-q, 6a-j have been synthesized from ethyl [4-(alkylthio)phenoxy]acetates 1a,b through multi-step reaction sequence. The structures of new compounds have been esta¬blished on the basis of their elemental analysis and IR, ¹H and ¹³C NMR and mass spectral data. Selected title compounds have been evaluated for anti-inflammatory activity and in vitro antibacterial testing against two pathogenic strains and antifungal screening against two fungi. Page(s): 144-152 2008-01-01T00:00:00Z