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Indian Journal of
Chemistry |
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Sect. B: Organic Chemistry
including Medicinal Chemistry |
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VOL. 47B |
NUMBER 11 |
November
2008 |
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CONTENTS
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Papers
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1695 |
Conventional
and microwave induced synthesis of various azetidinone and thiazolidinone
derivatives from 3- (1E)-1-aza-2-(2-chloro-7-methoxy-3-quinolyl)-vinyl]-4-(aryldiazenyl)
phenol 1 and their antimicrobial screening |
2-Azetidinones
2 and 4-thiazolidinones 3 have been synthesized by the reaction of
Schiff bases 1 with chloroacetyl chloride and mercapto acetic acid,
respectively. Both the reactions have been carried out by conventional and microwave methods. |
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Jigisha A Patel,
B D Mistry * & K R Desai
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1701 |
Role of copper in
catalyzing aryl and heteroaryl -nitrogen (or -oxygen) bond formation under
ligand-free and solvent-free conditions |
This report demonstrates that the formation of aryl- or
heteroaryl-nitrogen (or -oxygen) bonds under ligand and solvent-free
conditions are highly selective to the presence of copper. |
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Basudeb Basu*, Sajal Das &
Bablee Mandal
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1707 |
Synthesis of novel bis heterocycles: Bis pyrroles,
pyrrolyl pyrazolines and pyrrolyl isoxazolines |
The
Michael acceptors, 1-arylsulfonyl-2-styrylsulfonylethenes have been used as
synthons to develop bis pyrroles, pyrrolyl pyrazolines and pyrrolyl
isoxazolines by 1,3-dipolar cycloaddition of tosylmethyl isocyanide, nitrile
imines and nitrile oxides. |
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V Padmavathi*, T Radhalakshmi, K Mahesh & A V Nagendra Mohan |
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1713 |
A new class of
2-oxazolines and 2-thiazolines are prepared by base promoted cyclization of
3-aryl-N-(2-hydroxyethyl)-4-(arylsulfonyl)butanamide/3-aryl-S-(2-aminoethyl)-4-(arylsulfonyl)butanethioates
with NaH in THF. The former compounds are also obtained by one pot
methodology using samarium(III) chloride. |
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A Padmaja*, T Payani & K Mahesh |
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1726 |
Synthesis of [N,N′-bis(5-benzoyl-4-phenylthiazol-2-yl)-N,N′-bisbenzyl]ethane-1,2-diamines |
Synthesis of [N,N′-bis(5-benzoyl-4-phenylthiazol-2-yl)-N,N′--bisbenzyl]ethane-1,2-diamines
5a-h and their antibacterial activity are reported. |
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S Asha, S L Manju, N S Pradeep, V George & K N Rajasekharan* |
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Notes |
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1731 |
Conversion of sabinene to
phellandral via |
The essential
oil of the seeds of Zanthoxylum rhetsa DC, which contains 72.7%
sabinene, after treatment with peracetic acid has been analysed by GC and
GC-MS. Twenty three compounds have been identified with p-menthane-1,
2, 7-triol (36.65%), as the major constituent. The triol on heating with 50%
H3PO4 forms phellandral |
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P Mohamed Shafi*, Beena Jose &
Leopold Jirovetz |
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1735 |
Superoxide
induced oxidative aromatization of Hantzsch 1,4-dihydropyridines |
Tetraethylammonium superoxide,
obtained in situ by the phase transfer reaction of potassium
superoxide and tetraethylammonium bromide, accomplishes an easy and efficient
oxidative aromatization of Hantzsch 1,4-dihydropyridines to their
corresponding pyridines under mild reaction conditions, at room temperature. |
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Raghvendra Singh Raghuvanshi &
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1739 |
Silica supported zinc
chloride catalyzed acetylation of amines, alcohols and phenols |
Silica
supported zinc chloride (SiO2-ZnCl2) has been prepared
and found to efficiently catalyze the acetylation of amines, alcohols and
phenols by stirring in acetonitrile at 80ēC under heterogeneous conditions.
The catalyst can be separated from the reaction medium simply by filtration
and re-used up to four times. |
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Raman Gupta, Vineet Kumar, Monika Gupta, Satya
Paul & Rajive Gupta* |
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1744 |
Absolute configuration of calogenin and
its 20-keto derivative
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The absolute configuration of calogenin 2 and
its 20-methyl keto derivative 1 is established. |
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Naveen K Khare*, Desh Deepak & Anakshi Khare |
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1748 |
Synthesis
of 4-deoxy-4-thioarabinofuranosyl disaccharides, analogs of Mycobacterial
arabinogalactan |
The
first chemical synthesis of a series of D-arabinofuranosyl-(1,5)-D-arabinofuranoside
disaccharides incorporating 4-deoxy-4-thioarabinose is described. |
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Naveen K Khare*, Robert C
Reynolds & Joseph A Maddry |
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1753 |
Synthesis of novel isoxazolyl
1,3,5-benzoxadiazocine-4-thiones as possible biodynamic agents |
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E Rajanarendar *, Firoz Pasha Shaik & A Siva
Rami Reddy |
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1759 |
Synthesis
of thiazines using an unusual means-sonication |
A
trouble free and swift method have been established for the synthesis of
thiazines from carbostyril CAB1
and dimidone DIM2 using
sulphur powder and iodine as a catalyst in presence of THF solvent. The structures of the
compounds have been elucidated on the basis of spectral analysis. |
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Vijay V Dabholkar* & Faisal Y Ansari |
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1762 |
BiCl3 mediated synthesis
of 4-chloro-5, 6-dihydro-2H-pyran
derivatives using microwave irradiation |
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A Thirupathaiah* & G Venkateshwar Rao |
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Authors for correspondence are indicated by (*) |
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