Synthesis of γ,δ-Aziridino α-Amino Acid Derivatives and their Stereoselective Ring Transformation to 2-(Aminomethyl)-1-aminocyclopropanecarboxylic Acid Derivatives
Nural, Yahya
1-Benzyl-2-(bromomethyl)aziridine was successfully substituted with protected glycine esters to afford alkyl 3-(N-benzylaziridin-2-yl)-2-aminopropanoates, as constrained heterocyclic diamino acid derivatives, in good isolated yields. These new aziridines proved to be excellent building blocks for ring transformation to the corresponding stereochemically defined 2-(aminomethyl)-1-aminocyclopropanecarboxylic acid derivatives, including methyl esters, piperidyl amides, and free carboxylic acids.
A new mechanism for selective recognition of cyanide in organic and aqueous solution
Nural Yahya
A simple colorimetric and fluorimetric chemosensor 3,5-dinitro-(N-phenyl)benzamide (DNBA), was synthesized for selective determination of cyanide anion in organic and aqueous solutions via novel chemodosimeter approach. The chemosensorDNBAshowed a chromogenic and fluorogenic selective response to CN(-)against competing anions such as F-, AcO-, and H(2)PO(4)(-)in organic (DMSO and ACN) and in aqueous solutions (in DMSO/H2O: 8:2, v/v). The intensive colorimetric and fluorimetric color changes were observed in ambient light and UV-light (lambda(ex). 365 nm) after cyanide interacted withDNBA. A method that can be used in the synthesis of new biologically active benzisoxazole compound was described by the reaction ofDNBAwith TBACN and KCN in DMSO or DMSO/H2O, respectively. All interaction mecha...