Indian Journal of Chemistry

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1 1357 Website address: Indian Journal of hemistry ect. B: rganic hemistry including Medicinal hemistry VL. 49B UMBE 10 ctober 2010 Papers 1363 Total synthesis of enokipodins A-D and cuparene- 1,4-diol Details of the first total synthesis of enokipodins A and B, and formal total synthesis of enokipodins and D, cuparene-1,4- diol and cuparene-1,4-dione have been described. Me H Enokipodin A Enokipodin B Me Me H Me H Me Me A rikrishna* & M rinivasa ao Me Me Department of rganic hemistry, Indian Institute of cience, Bangalore , India 1372 imple and efficient synthesis of Fmoc/Boc/bzprotected-β-amino alcohols and peptidyl alcohols employing Boc2 A facile method for the synthesis β-amino alcohols using sodium borohydride is demonstrated. Further, the protocol is also extended for the conversion of -urethane protected peptide acids to their corresponding alcohols. PgH Boc 2, DMAP THF, 0 o PgH abh 4 Pg : Fmoc, Boc, bz : H 3, H 2 6 H 5, H(H 3 ) 2, H 2 H(H 3 ) 2, H 2 t Bu, H 2 H 2 t Bu, H 2 6 H 4 t Bu, H 2 Bzl, (H 2 ) 4 Hbz, H 2 (H 3 )Bzl Lalithamba H & Vommina V ureshbabu* Peptide esearch Laboratory, Department of tudies in hemistry, entral ollege ampus, Bangalore University, Dr. B.. Ambedkar Veedhi, Bangalore , India IDIA J HEM, 49B(10)2010

2 Michael adduct: ynthons for a new class of heterocycles The Michael adduct, ethyl 3,4-diarylsulfonyl-2-cyanobutyrate has been used as synthon to develop amino-pyrazolones, amino-isoxazolones, amino-hydroxypyrimidinones, aminomercaptopyrimidinones and imino-pyrimidinediones Et H 2 H 2 2' ' Me H Me 2 3/4 5/6 7 3,4 = H, 5, 6 =, H A Padmaja*, T Payani, A Muralikrishna & V Padmavathi Department of hemistry, ri Venkateswara University, Tirupati , India otes 1384 Antibacterial and antitubercular activities of some diphenyl hydrazones and semicarbazones A series of diphenyl hydrazones and semicarbazones have been synthesized and their antibacterial and antituberculosis properties are reported. Y HH 2 =H, H 3 Y H Y=H 2, H A aja*, A K Agarwal, Mahajan, Pandeya & Ananthan 1 Pharmaceutical hemistry esearch Laboratory, Department of Pharmaceutics, Institute of Technology, Banaras Hindu University, Varanasi , India IDIA J HEM, 49B (10) 2010

3 ynthesis and characterisation of novel starburst phase transfer catalyst Phase transfer catalyst, 3,5-bis[(2-methyl-naphthylene-1-yl)- phenylamino-phenyl]-butyl-(2-methoxy-naphthalene-1-yl)phenylammoniumbromide (BPBPB) has been synthesized. The application studies of BPBPB as a Phase Transfer atalyst (PT) is studied by utilizing common organic reactions. BPBPB is an efficient catalyst for certain organic reactions and it is regenerative to about 95% in weight. 4 H 9 Br - H 3 + H 3 H 3 H 3 H 3 4 H 9 Br Et- H 3 iji Mathew, Divia, T D adhakrishnan air & Karickal Haridas* chool of hemical ciences, Kannur University, Payyanur ampus, Edat P , India 1394 A facile multicomponent synthesis of tetrasubstituted imidazoles using Fe 3+ -K10 catalyst under solvent-free microwave conditions An efficient, microwave assisted, multi-component synthesis of 1,2,4,5-tetrasubstituted imidazoles has been described. Ph Ph 1 H Fe 2 2 H 3+ -K10 atalyst H 4 Ac Ph 2 Ph MW, eat D aghuvanshi & Krishna and ingh* Department of hemistry, Faculty of cience, Banaras Hindu University, Varanasi , India IDIA J HEM, 49B(10)2010

4 ynthesis and antiparkinsonian activity of some new adamantyl thiazolidinonyl/azetidinonyl indole derivatives ynthesis and antiparkinsonian activity of new adamantyl thiazolidinonyl/azetidinonylindole derivatives are reported herein. The compound 4a exhibits the most potent antiparkinsonian activity. H 3 H H 4a unil Kumar, Hemlata Kaur, K K axena, Monica harma, Pinki Vishwakarma & Ashok Kumar* Medicinal hemistry Division, Department of Pharmacology, L.L..M. Medical ollege, Meerut , India 1406 ynthesis and in-vitro biological evaluation of some quinazolin substituted pyrazoles, pyrazolones and 1,3,4-oxadiazoles In the present study, a new series of pyrazoles 6a,b, pyrazolones 7a,b and 1,3,4-oxadiazoles 8-10a,b having the quinazolinone ring in the molecular framework have been synthesized from hydrazides 5a,b, possessing potent antibacterial and insecticidal activities. 6 H 5 H 3 H 3 6 H 5 H 3 6a, 6b 7a, 7b 1 6 H 5 (8-10) a-b = H - H 3 ; 1 = 4-l 3,5-( 2 ) 2, 2-2 Pramilla ah* & Vasudha Kaul Department of hemistry, J..V. University, Jodhpur , India IDIA J HEM, 49B (10) 2010

5 A one-pot synthesis of isoxazolyl benzo[b] [1,4] oxazin-3(4h)-ones via miles rearrangement A one-pot synthesis of isoxazolyl benzo[b] [1,4]oxazin-3(4H)- ones has been achieved by interaction of 2-chlorophenols, chloroacetyl chloride and different isoxazole amines involving miles rearrangement from readily available starting materials. + l l 1 2 l K H 2 DMF i) 0 o ii) E ajanarendar*, M agi eddy & K ama Murthy Department of hemistry, Kakatiya University, Warangal , India 1417 Microwave-assisted synthesis and antibacterial activity of 1-[3-(3-fluorophenyl) [1,8]naphthyridn- 2-yl]-3-(2-oxo-2H-chromenyl)-1H-4-pyrazolecarbaldehydes using solid support A simple and efficient method for the synthesis of 1-[3-(3- fluorophenyl)[1,8]naphthyridn-2-yl]-3-(2-oxo-2h-chromenyl)- 1H-4-pyrazolecarbaldehydes 4 in the presence of DMF-Pl 3 (Vilsmeier-Haack reagent) using silica gel as solid support under microwave irradiation is described. The compounds 4 have been screened for their antibacterial activity. F H 3 H 1 Pl 3 -DMF / i 2 MW F 3 2 H K Mogilaiah*, hiva Prasad & K hiva Kumar Department of hemistry, Kakatiya University, Warangal , India 1422 An elegant one-pot synthesis of isoxazolo[2,3- a]pyrimidines An elegant one-pot synthesis of isoxazolo [2,3-a]pyrimidines has been achieved by reaction of 3-amino-5-methylisoxazole with 4-arylidene-2-phenyl-5-oxazolones. Treatment of 3- amino-5-methylisoxazole with chalcones also resulted in the formation of isoxazolo [2,3-a]pyrimidines in a single step.the structure of the products have been elucidated by spectral and analytical data. H 3 H Ph H 3 ' E ajanarendar*, aju, M agi eddy & K ama Murthy Department of hemistry, Kakatiya University, Warangal , India IDIA J HEM, 49B(10)2010

6 odium carbonate: A versatile catalyst for Knoevenagel condensation atalytic amounts of sodium carbonate (a 2 3 ) catalyze the condensation of aromatic aldehydes with active methylene compounds to afford arylmethylidene products under the grindstone method. The reactions go to completion within 1 5 min. at 26º and give products in excellent yields. H + Grindstone method olvent-free a 2 3, 1-5 mins = Et, 90-96% M A Pasha*, Krishnappa Manjula & V P Jayashankara Department of tudies in hemistry, entral ollege ampus, Bangalore University, Bangalore , India Authors for correspondence are indicated by (*) IDIA J HEM, 49B (10) 2010