Indian Journal of Chemistry

Sect. B : Organic Chemistry including Medicinal Chemistry

VOL. 41B

NUMBER 4

APRIL 2002

CONTENTS

Papers
800	Synthetic ionophores: Part 21 ¾ Synthesis and ionophore character of 2-hydoxythiophenol based podands and macrocycle	CH2XCH2 = 2,6-Py or CH2SCH2 R = CH2CH2CH3 or m-CH2-C6H4-CH2
	Subodh Kumar, Sukhdeep Kaur & Harjit Singh*
804	Studies on 6-[(dimethylamino) methylene] aminouracils: A facile one-pot synthesis of novel pyrido[2,3-d]pyrimidines	Novel pyrido[2,3-d]pyrimidines have been synthesised regioselectivily by the reaction of 6-[(dimethylamino)-methylene]-1,3-dimethyluracil with various a, b-unsaturated carbonyl compounds in high yields.
	P Saikia, A J Thakur, D Prajapati & J S Sandhu*
808	Synthesis of functionalized cis-syn-cis triquinanes	Functionalized cis-syn-cis triquinane ring systems are identified as useful precursors to higher polyquinanes. In this regard, various strategies to prepare these triquinane ring systems from caged compounds are described.
	Sambasivarao Kotha* & Ethirajan Manivannan

812	Synthesis of new heterocyclic compounds via cycloaddition reaction	The reaction of bis-(p-3,5-dioxo-1,2,4-triazolin-4-yl)-methane (diphenylmethanebistriazolinedione, DPMBTAD) with monomeric cyclopentadiene, 5,5-dimethoxy-1,2, 3,4-tetrachlorocyclopentadiene, hexachlorocyclopentadiene, isoprene, 1,3-cyclohexadiene, and anthracene has been investigated.
	Shadpour E Mallakpour* & Jila Asghari
817	Reactions of amines and formaldehyde/aryl aldehydes in combination or in isolation, with 1-(2-hydroxyphenyl)-1,3-butanedione	1-(2-Hydroxyphenyl)-1,3-butanedione reacts with Schiff bases of aryl aldehydes and amines to give imines. It cyclizes to give 3-aminomethyl-2-methyl-chromone when boiled in ethanol with a secondary amine.
	S V Potnis & S D Samant*
821	Synthesis and crystal structure of 3-methoxycar-bonyl-5- methyl -1-p-tolyl-1,2,4-triazolo [3,4-c]-1,2,4-triazole	Synthesis of 3-ethoxycarbonyl-5-methyl-1-p-tolyl-1,2,4-triazolo [3,4-c] -1,2,4-triazole 5a by reaction of 5-allylmercapto-3-methyl-1,2,4-triazole 3 with ethyl chloroglyoxalate p-tolylhydrazone 4. The structural assignment is based on spectral and X - ray data.
	F Lazrak, N H Ahabchane, A Keita, E M Essassi*, & M Pierrot
826	Kinetics and mechanism of oxidation of some diols by benzyltrimethylammonium chlorobromate
	Monica Bhatt, Pradeep K Sharma & Kalyan K Banerji*

832	Correlation analysis of reactivity in the oxidation of substituted benzaldehydes by benzyltrimethylammonium tribromide
	Satish K Mehla, Seema Kothari & Kalyan K Banerji*
839	Synthesis and antimicrobial activity of new triazolo/tetrazolo pyridazine [6,7]benzocycloheptenes	Fused pyridazine ring systems synthesized from substituted benzocyclohepten-5-one.
	Venkateswarlu Peesapati* & Chitty Venkata Srikant
845	The chemistry of fossils of Ginkgo and its ancestors	Presence and chemical preservation of ginkgolic acids 1, tempenoidal lactones (ginkgolides A & B 2a, 2b, bilobalide 2c), biflavones (amentoflavone, bilobetin 3a, b), procyanidins 4 and anthocyanidins 5a, b in nine of the ten fossil-taxa (Gymnosperms) of the paleozoic-mesozoic eras are reported.
	S Ghosal*, A V Muruganandam, K S Satyan & S Chauhan
Notes
854	A facile synthesis of texamine	A convergent synthesis of texamine is described.
	Saumitra Sengupta* & Somnath Mondal
856	Synthesis of azetidin-2-one via in situ generated acid chlorides using hexachloroacetonetriethyl-phosphite	A one step synthesis of azitidin-2-ones 3a-i has been described by the reaction of imines 2 with acids 1 in the presence of hexachloroacetone, triethylphosphite and triethylamine.
	M Arun, V V Govande, A R A S Deshmukh & B M Bhawal*
858	Synthesis of angular furano- or pyrano-fused coumarins from natural scopoletin	Starting from natural scopoletin 2, synthesis of fused coumarins 4,7,8 and 9 are described.
	K Nagaiah, G L David Krupadanam & G Srimannarayana*
863	A mild and efficient method for deprotection of 1,1-diacetates by CeCl3.7H2O / NaI system	Simple and efficient method for the regeneration of aldehydes from their 1,1-diacetates using CeCl3^.7H2O / NaI system is described.
	G Sudhakar Reddy, R Radhika, Parvathi Neelkantan, & D S Iyengar*

865	Laser versus lamp photolysis : A comparative account of the photolysis of papavarine by laser and UV lamp	Papavarine when irradiated under N2 laser and UV lamp separately yields different products.
	Shivraj Singh Chawada, M M Bokadia & Shubha Jain*
868	Synthesis and antibacterial activity of 3-hydroxy-2-(prop-1'-enyl) chromones	3-Allyloxychromones 2a-d on refluxing in N,N-diethylaniline give the corresponding abnormal Claisen rearrangement products 3-hydroxy-2-(prop-1'-enyl)-chromones 3a-d.
	Ramachandra Puranik, Y Jayaprakash Rao & G L David Krupadanam*
871	Synthesis and pharmacological activity of 1,4-benzodiazepine derivatives	7-Bromo-2, 3, 4, 5-tetrahydro-1H-1, 4-benzo[e][1,4]di-azepine 4 and 7-bromo-1, 2, 3, 4-tetrahydrobenzo-[e][1,4]diazepin-5-one derivatives 5 have been prepared from 7-bromo-3, 4-dihydro-1H-benzo[e][1,4]-diazepine-2, 5-dione 2.
	A N Osman, A A El-Gendy*, R H Omar, L Wagdy & A H Omar

875	Synthesis and antioxidant activity of hispolon, a yellow pigment from Inonotus hispidius	Hispolon 5 has been synthesised from veratraldehyde 1 in four steps with an overall yield of 23%. Compound 5 shows strong antioxidant and weak antibacterial activity.
	S Venkateswarlu, M S Ramachandra, K Sethuramu & Gottumukkala V Subbaraju*
878	New aliphatic ester and alcohol from the leaves of Ziziphus mauritiana	Undecyl-hexadecanoate 1 and 12-hydroxyhentriacontane 2 have been isolated from the leaves of Ziziphus mauritiana and characterised by IR, NMR and mass spectral data.
1 2
	Santosh K Agarwal^*, Sushma Verma, Sudhir S Singh, S S Sammal & Sushil Kumar
881	Euphane triterpenoid ester and a pterocarpan from Butea monosperma leaves	In addition to 3,9- dimethoxypterocarpan, a new triterpenoid ester isolated from the leaves of Butea monosperma has been characterized as 3a- hydroxyeuph-25-enyl heptacosanoate by spectroscopic and chemical methods.
	Y N Shukla*, M Mishra & Sushil Kumar

884	Triterpenoid glycoside from the stems of Calotropis procera	From the stem of C. procera 3-O-a-l-rhamnopyra-nosyl (1®2)-b-d-glucopyranosyl (1®2)-b-d-galacto-pyranosyl-3b-hydroxyolean-12-en-28 oic acid-28-O- b-d-xylopyranoside.
	Aditi Gupta, Anjali Gupta, Renu Rai, I R Siddiqui & J Singh*
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