|
Indian Journal of Chemistry |
||||
|
Sect. B: Organic Chemistry including Medicinal Chemistry |
||||
|
VOL. 46B |
NUMBER 3 |
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). |
||
|
|
|
|||
|
|
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 |
||
|
|
|
|||
|
|
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. |
||
|
|
|
|||
|
|
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 |
|||
1 
2
