http://nopr.niscair.res.in/handle/123456789/1393 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1421 Title: Synthesis of azo compounds containing thymol moiety <br/> <br/>Authors: Koshti, S M; Sonar, J P; Sonawane, A E; Pawar, Y A; Nagle, P S; Mahulikar, P P; More, D H <br/> <br/>Abstract: The present work includes the synthesis of azo compounds containing thymol moiety. <br/> <br/>Page(s): 329-331 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1420 Title: A new scalarane sesterterpene from a marine sponge Hyatella cribrifomis Hyatt of the Indian ocean <br/> <br/>Authors: Kumar, M M Krishna; Krishna, N; Muralidhar, P; Sastry, B S; Rao, D Venkata <br/> <br/>Abstract: A new scalarane sesterterpene, 24-β-methoxyscalarolide 4, along with known scalaranes- 12-epi-deoxoscalarin 1, 12-epi-12-deacetyl-25-deoxyscalarin 2 and scalarolide 3 has been isolated from a marine sponge, Hyatella cribriformis, of the Indian ocean. The structure of compound 4 has been determined on the basis of ¹H and ¹³C NMR, DEPT, ¹H-¹H COSY and EIMS experiments. <br/> <br/>Page(s): 325-328 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1419 Title: p-TsOH Catalyzed regioselective synthesis of 8,8'-methylene-bis-4- oxo-dihydrochromeno [4,3-c]pyrazoles <br/> <br/>Authors: Reddy, Ch Sanjeeva; Nagaraj, A <br/> <br/>Abstract: The ethyl-5-[3-(ethoxycarbonyl)-4-hydroxybenzyl]- 2-hydroxybenzoate 3 is prepared by the usual esterification of 5-(3-carboxy-4-hydroxybenzyl)-2-hydroxy benzoic acid 2. Compound 3 on reacting with ethyl acetoacetate yields 3-acetyl-6-[(3-acetyl-4-hydroxy-2-oxo-2H-6- chromenyl)methyl]-4-hydroxy-2H-2-chromenone 4. The regioselective conversion, by cyclizing the hydrazone 5 of compound 4 to either 8,8'-methylene-bis-4-oxo-1,4-dihydrochromeno [4,3-c]pyrazoles 6 with p-toluene sulfonic acid in refluxing xylene or 8,8'-methylene-bis-4-oxo-2,4-dihydro chromeno[4,3-c]pyrazoles 7 with corresponding hydrazine hydrochloride in refluxing acetic acid is described. <br/> <br/>Page(s): 319-324 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/1418 Title: Ceric ammonium nitrate (CAN) promoted efficient solid phase synthesis of amide derivatives: A green approach <br/> <br/>Authors: Reddy, Ch Sanjeeva; Raghu, M; Nagaraj, A <br/> <br/>Abstract: Ceric ammonium nitrate (CAN) has been found to be an efficient catalyst for the solid phase synthesis of amide derivatives of a wide range of substituted carboxylic acids and urea in excellent yields under microwave irradiation conditions. High yields are achieved even on a gram scale, while reaction times are considerably shortened. This method displays both economic and environmental advantages. <br/> <br/>Page(s): 315-318 Tue, 29 Jan 2008 22:58:59 GMT