Abstract: Dimethyl sulphoxide reagent brings about N-methyl thiomethylation and N-hydroxy methylation in phthalimide at elevated temperature. It also converts 5,5-disubstituted barbituric acid to its N-methyl thiomethyl and N,N^/-methyl thiomethyl derivatives at reflux temperature. A convenient and efficient procedure for the synthesis of poly(methylene-bis)-1,3-indandione derivative (2) was developed by one-pot reaction of 1,3-indandione (1) when refluxed with DMSO at 180°C . This provides an alternate method of mechanistic interest for the synthesis of tetrad (2) with excellent yield. The condensation product (2) can act as a basic unit for the synthesis of a polymer.

Abstract: There has been considerable interest in various analogues of antitubercular drugs particularly against multidrug and extensively drug resistant tuberculosis because mycobacterium species has developed resistant against available drugs. The currently used antitubercular also causes some serious toxic effects and also require long period of therapy for the treatment. Therefore, various new drugs and analogues of currently used antitubercular drugs were prepared with minimum side effects or effective against multidrug and extensively drug resistant strains of tuberculosis. In present review we discussed about brief introduction of tuberculosis followed the rifampicin and their analogues which are effective against tuberculosis.

Abstract: Despite the small difference in the steric hindrance of the substitutes of the asymmetric carbon of the lactic acid, a way for the desymmetrization of the racemic mixture was discovered. Two possibilities have arisen: the synthesis and further separation of diastereoisomers with the (S)-2-methyl-1-butanol as chiral auxiliary and the kinetic discrimination during the esterification with the (R)-(-)-Myrtenol.

Abstract: The review summarizes literature dealing with the synthesis of thiazolidinoneand β-lactamVarious methods for synthesis of thiazolidinone and β-lactamare discussed. Like boiling benzene thioglycolic acid was added to (1)a-d using a water separator to give thiazolidinone derivatives (2)a-d. Also Reaction of the Schiff bases of 3 and /or5 with one mole of thioglycolic acid was proceeded smoothly to afford the corresponding thiazolidinone derivatives 6,7 respectively. The synthesis of a new type of compound, 2-hydrazolyl-5,5-diphenyl-4-thiazolidinone (24), obtained by treatment of thiosemicarbazone with benzyl in basic media. β-lactams were prepared by N-Tosyl-3-halo-3-butenylamines underwent efficient Ullmann-type coupling to afford 2-alkylideneazetidines, which could be readily converted to the corresponding β-lactams by oxidation with O₃ to give β-lactams 119. A chiral N-heterocyclic carbene catalyzed the Staudinger reaction of arylalkylketenes with a variety of N-tert-butoxycarbonylarylimines to give the corresponding cis-β-lactams 124.

Abstract: The titled compounds were prepared by interaction of ethyl 2-(benzo[d]thazol-2-yl)acetate (3) with different arylidinemalononitrile derivatives (4a-c) in EtOH/TEA solution at room temperature. When 3 was treated with 2-(ethoxymethylene)-malononitrile (4f) under same reaction conditions, the ethyl iminothiazolopyridine-4-carboxylate (6) was obtained. Ethyl (amino(methoxy)methyl)-3-(substitutedphenyl)-1-oxo-1H-benzo[4,5]thiazole[3,2-a]pyridine-4-carboxylate (8a,b) was obtained from reaction of 3 with different cyanoacrylate derivatives (7a,b) in MeOH/TEA at room temperature, while the diethyl thiazolo[3,2-a]pyridine-4-carboxylate derivative (8c) was obtained under same reaction conditions. The amino-imino derivative (10) was also prepared and used to synthesis new pyrido[3,2-e][1,2,4]triaziolo[1,5-c]pyrimidine-5-carboxylate derivatives (12). The structures of all the newly synthesized compounds were confirmed based on their elemental analysis and spectroscopic data.