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Sect. B: Organic Chemistry including Medicinal Chemistry
VOL. 50B		NUMBER 11		November 2011
CONTENTS
Papers
1611	Synthesis of 1-(2,4-dinitrophenyl)-3-aryl-4-(arylsulfanyl)-1H-pyrazoles by Vilsmeier reaction of 2,4-dinitrophenylhydrazones of phenacyl aryl sulfides		Synthesis of a set of 1-(2,4-dinitrophenyl)-3-aryl-4-(arylsulfanyl)-1H-pyrazole by the Vilsmeier reaction of 2,4-dinitrophenylhydrazones prepared from differently substituted phenacyl aryl sulfides is described.
	Ramaiyan Manikannan, Ramaiyan Venkatesan & Shanmugam Muthusubramanian* Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625 021, India
1619	Synthesis and cytotoxity of novel benzopyran derivatives
	Anil K Tripathi*, Debaraj Mukherjee, Surrinder Koul, Subhash C Taneja, Satyam K Agrawal, Parduman R Sharma & Ajit K Saxena Bio-Organic Chemistry Section, Indian Institute of Integrative Medicines (CSIR), Canal Road, Jammu 180 001, India
1630	Ecofriendly and sustainable efficient synthesis of bis(indolyl)methanes based on recyclable Brønsted (CSA) or Lewis (ZrOCl2.8H2O) acid catalysts		Efficient one-pot synthesis of bis(indolyl)methanes catalyzed by CSA or ZrOCl2.8H2O has been described.
	Sarita Mishra & Rina Ghosh* Department of Chemistry, Jadavpur University, Kolkata 700 032, India
1637	Changeover from (3,4) ene cyclization to (3,5) mode under the influence of Lewis acid catalyst: A quantum mechanical study		A comparison between the B3LYP/6-31G* optimized transition structures (TSs) of the Lewis acid catalyzed (3,4) and (3,5) ene cyclization are reported.
	Sukhendu Roy, Kuheli Chakrabarty, Sampad Narayan Gupta & Gourab Kanti Das* Department of Chemistry, Visva-Bharati, Santiniketan 731 235, India
1645	Synthesis and antimicrobial studies of Schiff bases of fluoroquinolone		Schiff base of fluoroquinolones synthesized and evaluated for antimicrobial activity against five microbes. Majority of them demonstrated good to moderate activity.
	R1 = substituted piperazines, morpholine, imidazole
	Navin B Patel*, Sarvil D Patel, Arvind L Patel, Jaymin C Patel & Jignesh N Patel Department of Chemistry, Veer Narmad South Gujarat University, Surat 395 007, India
	Notes
1658	Synthesis of thiazolyl benzimidazoles and thiazolyl coumarins linked to isoxazole as possible biodynamic agents		A new series of linked heterocyclics, 5-(1H-benzo[d]imidazol-2-yl-methyl)-3-(3-methyl-5-[(E)-2-phenyl-1-ethenyl]-4-isoxazolyl)-2-aryl-1,3-thiazolan-4-ones 4 and 3-{3-methyl-5-[(E)-2-phenyl-1-ethenyl]-4-isoxazolyl}-5-(2-oxo-2H-3-chromenyl)-2-aryl-1,3-thiazolan-4-ones 5 have been synthesized by the cyclocondensation of 4-benzalamino-3-methyl-5-styrylisoxazole 2 with mercapto succinic acid followed by cyclization with 1,2-phenylenediamines or salicylaldehydes. Structures of all the newly synthesized compounds 3-5 have been confirmed by spectral and micro analytical data.
	E Rajanarendar*, K Rama Murthy, M Nagi Reddy & Firoz Pasha Shaik Department of Chemistry, Kakatiya University, Warangal 506 009, India
1667	FeCl3 catalyzed synthesis of β-keto enol ethers under solvent-free microwave irradiation condition		β-Keto enol ethers have been synthesized in very good yield under solvent-free microwave irradiation condition from alcohols and β-diketones in presence of ferric chloride as a catalyst.
	B P Venkat Lingaiah, T Yakaiah, A Chandra Shekhar, A Ravi Kumar, G Sathaiah, G Venkat Reddy, B Narsaiah & P Shanthan Rao* Fluoroorganics Division, Indian Institute of Chemical Technology, Hyderabad 500 607, India
1671	A convenient synthesis of ethyl furo[2,3-h]flavone/chromone-8-carboxylates
	S Satyanarayana Reddy, M Venkati, Y Jayaprakash Rao, Kamalesh K Sharma & G L D Krupadanam* Department of Chemistry, Osmania University, Hyderabad 500 007, India
1677	A new modified synthetic method for preparation of N, N-dichlorocarbamates		A rapid, efficient, economic and easy to scale method for the effective conversion of carbamates to corresponding N,N-dichlorocarbamates by using calcium hypochlorite in acidic medium has been described. The transformation has been carried out at room temperature with high yield and purity with reduced reaction time.
	Pranav K Gutch*, Ravindra Singh & M V S Suryanarayana Synthetic Chemistry Division, Defence R & D Establishment, Jhansi Road, Gwalior 474 002, India
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