Intermolecular alkyl/aryl exchange of 2-iminothiazoles with isothiocyanates and isocyanates: scopes and limitations
作者:Dongyun Shin、Jihoon Lee、Hoh-Gyu Hahn
DOI:10.1016/j.tet.2010.05.015
日期:2010.7
have reported an efficient method by which alkyl group of 2-alkyliminothiazoles is changed into other alkyl groups by isothiocyanates. In this article, a detailed mechanistic aspect, and the scopes and limitations were disclosed. All the reactions were carried out in toluene at 105 °C without any additive. The reaction is a reversible process and the equilibrium is determined by the reactivity of both
Chiral isothiocyanates – An approach to determination of the absolute configuration using circular dichroism measurement
作者:Oskar Michalski、Dariusz Cież
DOI:10.1016/j.molstruc.2012.12.048
日期:2013.4
Abstract Chiral alkyl 2-isothiocyanates have been obtained from enantiopure, aliphatic amines. ECD measurements allowed us to correlate an absoluteconfiguration at C-2 with a sign of the Cotton effect (CE) observed for n–π * transition at the longer-wavelength range of the spectrum. Chirooptical data calculated for all enantiomers were consistent with the measured CE values and indicated that the