EPR Studies on the SmI2-Promoted Coupling of N-(N‘,N‘-Dialkylaminoalkyl)benzotriazoles
摘要:
[GRAPHICS]Radicals generated in the Sml(2)-promoted coupling of N-(N',N'-dialkylaminoalkyl)benzotriazoles 1 have been detected using the EPR spin-trapping technique, Single electron transfer (SET) between 1 and Sml(2) is discussed as a mechanism for the formation of the radicals.
EPR Studies on the SmI2-Promoted Coupling of N-(N‘,N‘-Dialkylaminoalkyl)benzotriazoles
摘要:
[GRAPHICS]Radicals generated in the Sml(2)-promoted coupling of N-(N',N'-dialkylaminoalkyl)benzotriazoles 1 have been detected using the EPR spin-trapping technique, Single electron transfer (SET) between 1 and Sml(2) is discussed as a mechanism for the formation of the radicals.
作者:Alan R. Katritzky、Konstantina Yannakopoulou、Hengyuan Lang
DOI:10.1039/p29940001867
日期:——
Reactions of N-(α-benzotriazolylalkyl)-N,N-dialkylamines with the dialkylamine corresponding to the dialkylamino substituent afford symmetrical aminals in good yields. Treatment with other dialkylamines gives mixtures of the unsymmetrical and the two symmetrical aminals. Cross-over experiments of symmetrical aminals demonstrates interconversions involving iminium ions and that equilibria exist in the
A General Method for the Preparation of β-Aminoesters
作者:Alan R. Katritzky、Konstantina Yannakopoulou
DOI:10.1055/s-1989-27381
日期:——
3-Dialkylamino (3) and 3-benzyloxycarbonylamino (6) esters are prepared by the Reformatsky reaction of 1-dialkylamino-(1) and 1-benzyloxycarbonylamino-(5) 1-(1-benzotriazolyl)alkanes with ethyl 2-bromoalkanoates. Compounds 1 and 5 are obtained by the condensation of benzotriazole, an aldehyde, and a secondary amine or benzyl carbamate. The procedure can be performed by as a one-pot reaction from benzotriazole.