Substituted 3-(fluoroacyloxy)quinoline-2,4(1H,3H)-diones including 3-(fluoroiodoacetoxy) derivatives react with triethyl phosphite to afford either the product of the Perkow reaction or the corresponding 4-ethoxyquinolin-2(1H)-one. In both reactions, the fluorocarboxylate anion acts as the first observed leaving group. This observation restricts the application of the intramolecular Horner-Wads...

Complex oligosaccharide syntheses employ the use of more than one glycosyl donor and hence, methods for the interconversion of glycosyl donors are highly valuable for the overall synthesis plan. Herein, n-pentenyl glycosides are efficiently converted to glycosyl 1,2-O-orthoesters in the presence of both acid and base sensitive functional groups. The identified protocol was found to be suitable ...

An extension of our methodology on solid-phase synthesis of 3,4,5-trisubstituted-1,2,4-triazoles under mild conditions has been developed. Firstly, the resin-bound acylhydrazine is reacted with orthoesters to provide resin-bound 1,3,4oxadiazoles. Secondly, condensation of 1,3,4-oxadiazoles resin with the corresponding arylamines hydrochloride to form the resin-bound triazoles. 3,4,5-Trisubstitu...

Allylic and benzylic alcohols are converted into corresponding unsymmetrical ethers when reacted with various orthoesters in the presence of montmorillonite KSF at ambient temperature. A detailed study has been undertaken to examine the mechanism and generality of these reactions with regard to various acidic catalysts, which reveal interesting competitive reactions mainly O-acetylation, togeth...

The synthesis of a new class lawsone enaminone derivatives by using lawsone, triethyl orthoformate and aromatic amines in the presence guanidinium chloride under solvent-free conditions has been developed.

Galzigna, L., Ferraro, M. V., Manani, G., and Viola, A. (1973). British Journal of Industrial Medicine, 30, 129-133. Biochemical basis for the toxic effects of triethyl lead. The effects of triethyl lead (PbEt3) have been studied in vitro on the cholinesterase activity of rat diaphragm and in vivo on serum cholinesterase in the dog. PbEt3 dramatically increases the duration of succinylcholine-i...