<smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="metricconverter"> ¹H and ¹³C NMR studies of some 1,1-bis(carbethoxy)-2-aryl-4-phenyl/(4-chlorophenyl)-4-oxobutane and their derivatives </smarttagtype>

917-922 The 1H and 13C NMR spectral features of 1,1-bis(carbethoxy)-2-aryl-4-phenyl/(4-chlorophenyl)-4-oxobutane 1a-j and their carbonyl derivatives 2a-e are discussed in the light of their diastereotopic characteristics and preferred conformational structures for 1 and 2 are proposed. </smarttagtype

Mass spectral analysis and X-ray structure of diethyl 2-[aryl(4-aryl-1,2,3-selenadiazol-5-yl)methyl]malonate

758-761The mass spectra of diethyl 2-[aryl(4-aryl-1,2,3-selenadiazol-5-yl)methyl]malonate have been studied by electron impact method using high resolution mass spectrometry. The X-ray structure of a representative compound is also investigated

Synthesis and characterization of 5-(cyclohexylsulfanyl)- 4-aryl-1,2,3-selena/ thiadiazoles

305-309The synthesis and characterization of new 5-(cyclohexylsulfanyl)-4-aryl-1,2,3-selena/ thiadiazoles, obtained from the -sulfanyl semicarbazones are described. The structures of these compounds have been established by ¹H NMR, ¹³C NMR and single crystal X-ray diffraction

Synthesis and antioxidant characteristic of novel thiazolidinone derivatives

377-383A series of novel thiazolidinone derivatives have been synthesized by solventless condensation of N-alkylamines with arylaldehydes at room temperature followed by a microwave assisted solventless addition of thioglycollic acid to the resultant imines. The synthesized compounds are characterized by 1H NMR, 13C NMR, MS and X-ray techniques and one of the synthesized thiazolidinones has been evaluated for its antioxidant property

Acetic anhydride induced rearrangement and Grignard addition on C-phenyl-N-(1-methyl-2-aryl)ethyl nitrones

646-653This article describes the acetic anhydride induced rearrangement of nitrone to amide and the addition of Grignard reagent to the nitrones yielding substituted hydroxylamines. It has been found that the conversion of C-phenyl-N-(1-methyl-2-aryl)ethyl nitrones 1 to N-(1-methyl-2-arylethyl)arylcarboxamides 2 is clean, selective and quantitative under solventless condition with microwave irradiation. The Grignard addition on nitrones 1 with phenylmagnesium bromide has been found to be very effective giving hydroxylamine derivatives quantitatively. All the synthesised compounds have been fully characterized by NMR and single crystal X ray analysis. </span

Chemoselective hydrazine addition to diethyl 2-(2,3-dioxo-1,3-diarylpropyl)malonates and a tandem deesterification

1526-1530The structural features of the product of the chemoselective reaction of hydrazine on only one of the ketones in a gem diester system with two keto groups by hydrazinium sulfate and hydrazine hydrate are described. A tandem deesterification has also been noticed during the reaction with hydrazine hydrate

An efficient solventless synthesis of ⍺-aryl-N-[1-methyl-2- (2/4-chlorophenyl)] ethyl nitrones and their antimicrobial activity

276-282An efficient solventless synthesis of ⍺-aryl-N-[1-methyl-2-(2/4-chlorophenyl)]ethyl nitrones has been achieved in excellent yield. The compounds are characterized by NMR and X-ray studies. The antimicrobial activities of the synthesized compounds have also been investigated