469

CONTENTS

Indian Journal of Chemistry
Sect. B: Organic Chemistry including Medicinal Chemistry
VOL. 46B / NUMBER3 / MARCH 2007
CONTENTS
Papers
471 / HPAEC and MALDI-TOF-MS analysis of oligosaccharides generated from sesame meal by enzymatic hydrolysis
IPC: Int.Cl.8 C07C / Generation of xyloglucan oligosaccharides 1 through 6 from Sesamum indicum meal by enzyme hydrolysis and their characterisation by sugar compositional and linkage analysis, HPEAE-PAD-chromatography and MALDI-TOF-mass spectrometry has been carried out.
Kaushik Chattopadhyay, Partha Ghosh, Pradyot Ghosal & Bimalendu Ray*
478 / Prediction of acidity constant for substituted acetic acids in water using artificial neural networks
IPC: Int.Cl.8 C07C / Linear and non-linear quantitative structure-activity relationships have been successfully developed for the modeling and prediction acidity constant (pKa) of 87 substituted acetic acids with diverse chemical structures.
Aziz Habibi-Yangjeh* &
Mohammad Danandeh-Jenagharad
488 / Synthesis of 1-alkyl/aralkyl-2-(1-arylsul fonylalkyl)benzimidazoles under PTC conditions
IPC: Int.Cl.8 C07D / 2-(α-Chloroalkyl)benzimidazoles 1 on reaction with arylsulphinate sodium salt 2 in CH3CN under PTC conditions, give 3 which on alkylation yields 1-alkyl/aralkyl 2-(α-arylsulfonylalkyl)benzimidazoles 4. Alternatively, 4 can also be prepared by the reaction of 2 with 1-alkyl/aralkyl-2-(α-chloroalkyl)benzimidazole 5 in CH3CN using PTC conditions.
P K Dubey*, P V V Prasada Reddy & K Srinivas
492 / Chemical constituents of Evolvulus nummularius
IPC: Int.Cl.8 C07C / Three new compounds 1-3 along with β-sitosterol and its glucoside, stigmasterol, d-mannitol, ursolic acid and oleanolic acid have been isolated from aerial parts of Evolvulus nummularius (Convolvulaceae).
1 R΄= stearoyl, R= stigmasteryl
2
3s
Biswanath Dinda*, Biplab Ghosh, Shiho Arima, Nariko Sato & Yoshihiro Harigaya
499 / Novel one-pot synthesis of 1,3-dithiins and 1,3-thiazines under microwave irradiation
IPC: Int.Cl.8 C07D / Microwave induced synthesis of 1,3-dithiins and 1,3-thiazines involving Knoevenagel condensation followed by Michael addition under solvent-free conditions in one-pot is reported. The reaction is catalyzed by cheap and easily available NaCl.
Ibadur R Siddiqui* & Pravin K Singh
505 / Synthesis of CL-20: By oxidative debenzylation with cerium(IV) ammonium nitrate (CAN)
IPC: Int.Cl.8 C07D / A simple debenzylation approach has been discussed for the synthesis of hexanitrohexaazaisowurtzitane (HNIW or CL-20) one of the most powerful high explosives of today with cerium ammonium (IV) nitrate.
G M Gore, R Sivabalan*, U R Nair, A Saikia,
S Venugopalan & B R Gandhe
509 / p-Selectivities of trans-2-heterobicyclo[4.4.0]decan-5-ones in reductions with NaBH4 and Na(CN)BH3
IPC: Int.Cl.8 C07D / The nheteroatom→s*# interaction hypothesis to explain the relative reaction rates and the axial selectivities of nucleophilic additions to 2-heterobicyclo[4.4.0]decan-5-ones in relation to the corresponding carba-analog does not find experimental as well as theoretical support. The selectivity is rather dependent on the differential electron-withdrawing abilities of the heteroatoms that translate further into differential svicinal→p*C=O interactions in the ground states of the molecules. The heightened axial selectivity of the aza-species is probably due to hydrogen bonding of nitrogen with the solvent that enhances its electron withdrawing ability further.
Rengarajan Balamurugan,
Vardhineedi Sriramurthy & Veejendra K Yadav*
516 / Orizalanasteroloide A and B from rice hulls of Oryza sativa
IPC: Int.Cl.7 C07C / Two new triterpene glycosides have been reported from Oryza sativa and structure elucidated by spectroscopic methods.
Ill-Min Chung, Mohd Ali & Ateeque Ahmad*
Notes
523 / Synthesis and spectrum of new Schiff bases as polydentate ligands and potential antibacterial reagents
IPC: Int.Cl.7 C07D / Eight novel linear polydentate Schiff base ligands, N,N′-bis(R-iminoethyl)-2,6-pyridine- dicarboxylic diamide IIa-g, have been synthesized. Microcalorimetric test of the inhibitory capacities of these compounds on E. coli and S. aureus show that they have antibacterial activity to different extent.
Li-Hua Cai, Pei-Zhi Hu *, Xiao-Lan Du,
Li-Xia Zhang Yi Liu
529 / Lewis acid catalyzed amino-Claisen rearrangement: A facile one pot synthesis of 2-allylarylamines from N-allylarylamines
IPC: Int.Cl.8 C07C / Boron trifluoride-diethyl ether complex efficiently catalyzes a variety of amino-Claisen rearrangement of N-allylarylamines 1a-g to afford 2-allylarylamines
2a-g in moderate to good yields.
Seema Jain, Neelesh Pandey & D Kishore*
532 / Synthesis of pyrazole and isoxazole in triethanolamine medium
IPC: Int.Cl.8 C07D / Reaction of 2'-hydroxy chalcone dibromides with phenyl hydrazine and hydrazine hydrate affords pyrazoles and with hydroxylamine hydrochloride give isoxazoles in triethanolamine medium. Similarly reaction of b-diketone with phenyl hydrazine and hydrazine hydrate in TEA gives pyrazoles in high yield in shorter time.

Nitin N Agrawal* & P A Soni

535 / Enamination of 1,3-dicarbonyl compounds catalyzed by tin tetrachloride
IPC: Int.Cl.8 C07C / Tin tetrachloride has been found to be an extremely efficient catalyst for the enamination of 1,3-dicarbonyl compounds under solvent-free conditions at room temperature.
Zhan-Hui Zhang*, Zi-Chuan Ma & Li-Ping Mo
540 / Reaction of 2-acetylbenzofuranhydrazone with aromatic aldehydes: Formation of aldzaines and regeneration of 2-acetylbenzofuran
IPC: Int.Cl.8 C07D / Hydrolytic cleavage of 2-acetylbezofuran hydrazone under acidic condition with aromatic aldehyde is described.
Ravi K Ujjinamatada* &
Yankangouda S Agasimundin
544 / Synthesis and bioactivity study of 2,5-bismercapto-1,3,4-thiadiazole heterocyclic derivatives
IPC: Int.Cl.8 C07D / A series of acylhydrazone compounds 3 and acylthiosemicarbazides 4 and some heterocyclic derivatives 5 containing thiadiazole rings have been synthesized conveniently in high yields. The bioassay result indicates that some compounds have relatively low antibacterial activity and bioactivity for improving plant growth.
Man-Lin Li, You-Ming Zhang & Tai-Bao Wei*
550 / Synthesis and characterization of new quinazolines as potential antimicrobial agents
IPC: Int.Cl.8 C07D / Several Aryl-N-(5-{4-[2-(2-chlorophenyl)-4-oxo(3-hydroquinazolin-3-yl)]phenyl} (1,3,4,thiadiazol-2-yl))amides 4a-l have been prepared and tested for their antibacterial and antifungal activities.

R= 2-Chlorophenyl, Ar = different aryl groups
N C Desai*, P N Shihora & D L Moradia
Authors for correspondence are indicated by (*)
IPC: International Patent Classification
Int.Cl8.: International Classification, 8th Edition, 2006

INDIAN J CHEM, 46B (3) 2007