Indian Journal of Chemistry

Sect. B: Organic Chemistry including Medicinal Chemistry

Total visitors: 3,719  since 12-06-07

VOL. 46B


MAY 2007







Total synthesis of (±)-b-microbiotene, (±)-micro­biotol, (±)-cyclocuparanol and (±)-b-cuparenones


IPC: Int.Cl.8 C07C

Total synthesis of the sesquiterpenes mentioned in the title has been described.







A Srikrishna* & D B Ramachary









4-Piperidone – A synthon for spiro-heterocycles


IPC: Int.Cl.8 C07D

A new class of spiro compounds piperidino-oxirane,
-cyclo­propane, -thiazolidone, -thiadiazole and
-thiazine have been developed from tetra substituted 4-piperidone adopting modern synthetic methodologies.







V Padmavathi*, T V Ramana Reddy&

K Audisesha Reddy















Synthesis of 2-indolylbenzimidazoles using Fischer’s indole method


IPC: Int.Cl.8 C07D

Treatment of substituted phenylhydrazines 5a and 5b with acetylbenzimidazoles 3 and 4 under Fischer’s indolization conditions give 2-benzimidazolyl indoles 9. Alternatively 9 can also be synthesized by the reaction of substituted indole-2-carboxylic acids 10a and 10b with substituted o-phenylenediamino sulphates 1a and 1b in refluxing ethylene glycol.







P K Dubey*, Balaji Babu & M Venkata Narayana









Phase transfer catalysed reaction of potassium superoxide with some nitroalkanes in the presence of a,b-unsaturated enones


IPC: Int.Cl.8 C07C

Superoxide ion, generated in situ by the phase transfer reaction of potassium superoxide and 18-crown-6 ether, brings about an easy Michael addition of nitroalkanes to a,b-unsaturated enones to afford 1,4-addition products.








Krishna Nand Singh*, Raghvendra Singh Raghuvanshi &

Manorama Singh














Regeneration of the carbonyl group in the hypervalent iodine oxidation of carbonyl derivatives of dehydroacetic acid and its analogues


IPC: Int.Cl.8 C07D

Hypervalent iodine oxidation of carbonyl derivatives of dehydroacetic acid and its analogues leads to a mild and efficient regeneration of parent carbonyl compounds leaving pyrone moiety intact.






Rashmi Pundeer, Vishwas Chaudhri,

Mayank Kinger & Om Prakash*









Chemical reactivity of 3-hydrazino-5,6-diphenyl-1,2,4-triazine towards p–acceptors activated carbonitriles


IPC: Int.Cl.8 C07D

Behaviour of 3-hydrazino-5,6-diphenyl-1,2,4-triazine 1 as electron donor towards different electron acceptors activated carbonitriles has been investigated and a novel fused heterocyclic system and 2,3-disubstituted 1,2,4-triazines have been obtained. Compound 1 reacts with 1,2-dicyanobenzene as p–acceptor in DMF to form bezencarboximidamide 16, while reaction of 1 with a-bromomalononitrile 17 in boiling DMF affords compound 18. On the other hand, compound 1 reacts with tetracyanoethane 23 in DMF to yield compound 24. The route of reaction in DMF indicate that charge–transfer complexation is the key intermediate to obtain new heterocyclic systems. Structures of the products are established by MS, IR, UV-Vis, CHN and 1H NMR spectral data.




R M Abdel-Rahman & W R Abdel-Monem*















Chemical modifications of dehydrocostus lactone from Saussurea lappa and the study of structure-activity relationship


IPC: Int.Cl.8 A61K

Various chemical analogues of dehydrocostus lactone have been prepared using various chemo- and regio-selective reagents. The biological activity of the products as plant growth regulators has revealed that the extension of carbon chain length at C13 to a limited extent has marked effect on biological activity.





R R Setia*, K Kaur, R Mankala & B R Chhabra









Synthesis and study of biological activity of some new 1,4-benzothiazines


IPC: Int.Cl.8 C07D

The synthesis of n-(4-methylpyrimidin-2-one-4-yl)-1,4-benzothiazine-2,3-dione 5¸2-thio-2,6-dimethyl­[1,3,5]­triazino[3,4-c]-1,4-benzothiazine 9, [1,2,4]-tri­azino-2-oxo-[3,4-c][1,4]-benzothiazine 13, 5-aryli­dene-1H-1,4-benzothiazine [1,3,4]triazole 16a-b, 2-thio-6-methyl[1,3,5]triazino[3,4-c]benzothiazine 19 N-(2-propanonyl)-1,4-benzothiazine-3(1H)-one 20 and tricyclic compound cyclopenteno-1,4-benzo­thiazine 21 have been reported and tested for anti­fungal and antibacterial activity.






M B Deshmukh*, S A Deshmukh, S S Jagtap &

A R Mulik















Synthesis and characterization of some alkoxy­phthalimide derivatives of benzotriazolylthia­dia­zoles and benzotriazolylthiazolidinones


IPC: Int.Cl.8 C07D

Some 5-(1,2,3-benzotriazol-1-yl-methyl)-N-alkoxy-phthalimido-1,3,4-thiadiazol-2-amines 5a-b and 2-[(1,2,3-benzotriazolyl)acetohydrazido]-3-N-alkoxy-phthalimido-5-arylidene-1,3-thiazolidin-4-ones 9a-h have been synthesized from 2-(1,2,3-benzotriazol-1-yl-acetate) hydrazine carbothioamide 3 using two different reaction routes. Compound 3 in turn is prepared by the reaction of benzotriazole 1 with ethylchloroacetate followed by condensation with thiosemicarbazide. Synthesized compounds are characterized by analytical and spectral studies.





Swati Ojha, Usha Ameta, Neelam Dhakar &

G L Talesara*









Microwave-assisted synthesis of substituted-4-oxo-4H-1-benzopyran-3-carboxaldehydes using Vilsmeier reagent over silica gel


IPC: Int.Cl.8 C07D

Substituted-4-oxo-4H-1-benzopyran-3- 3- carboxalde­hydes 2 have been synthesised in  good yields under microwave irradiation  using Vilsmeier reagent over silica gel in  solvent free conditions.





Poonam Kamotra, Avinash K Gupta &
Rajive Gupta*














Synthesis of 3-(6-aryl-pyridin-2-yl)- and 8-(6-aryl-pyridin-2-yl) coumarins


IPC: Int.Cl.8 C07D

Mannich bases of 3-acetyl coumarin 1 and 4-methyl-7-methoxy-8-acetyl coumarin 4 on reaction with substituted phenacyl bromide pyridinium salts 2a-f in the presence of ammonium acetate in refluxing acetic acid afford the title 3-(6-aryl-pyridin-2-yl)- and 8-(6-aryl-pyridin-2-yl) coumarins 3a-f and 5a-f in moderate to good yields.









D I Brahmbhatt*, J M Gajera, V P Pandya &

M A Patel









A new flavone glycoside from Zanthoxylum acanthopodium DC


IPC: Int.Cl.8 C07D

Examination of the dry fruits of Zanthoxylum acan­tho­podium has led to the isolation of a new flavone glycoside along with herbacetin-8,4'-dimethyl ether. The new flavone glycoside is characterized as 7-O-a-d-glucosyl-3,8-dihydroxy-2-(3-hydroxy-4-methoxy­phenyl)-5-methoxy-4H-1-benzopyran-4-one on the basis of its spectral studies and that of its aglycone. This is the first report of the isolation of 5-O-substituted flavone from the genus Zanthoxylum.









B Ravindra Babu, Shilpi Khurana,

Rajeev Sakhuja, Amit K Srivastava & Subhash C Jain*

















Synthesis and fungicidal activity of some 3-(5-aryl-1,3,4-thiadiazol-2-yl)-1-(ß-d-glucopyrano­syl)-5-alkyl-2-thio-4-imidazolidinones


IPC: Int.Cl.8 C07D













Alok Kumar Srivastava, R K Khare* & H Singh









Synthesis and bioactivity of some new [3-[4-methylphenoxymethyl]-4-phenyl-[1,2,4]­triazole-5-thio]acetanilide derivatives


IPC: Int.Cl.8 C07D

The synthesis of some triazole derivatives starting from 4-methyl-phenoloxyacetyl hydrazide is described. The title compounds have been found to enhance root elongation.










Tai-Bao Wei, Jing Tang, Hong Liu & You-Ming Zhang*















Synthesis and antimicrobial activity of some new 2-substituted aminothiazoles


IPC: Int.Cl.8 C07D

Amino group of thiazole has been treated with various aromatic aldehydes to get the corresponding Schiff bases  (SMB-2 to SMB-9). These Schiff  bases have been reacted with chloracetyl  chloride to get the corresponding  azetidinones. Compounds SMB-1,  SMB-2 and SMB-6 show good  antibacterial and antifungal activity.





Bhavin Sutariya*, S K Raziya, S Mohan &
S V Sambasiva Rao









Authors for correspondence are indicated by (*)

IPC: International Patent Classification

Int.Cl8.: International Classification, 8th Edition, 2006