The Steric Effects of Alkyl Groups on the N–H Stretching Vibrations and the Rotational Isomerism of Alkylureas
作者:Yoshiyuki Mido、Tamotsu Gohda
DOI:10.1246/bcsj.48.2704
日期:1975.10
of the trans N–H band. It was also observed that the larger the effective size of the R′ group on R2UR′ is, the stronger the intensity of the additional band becomes. It was concluded, in connection with the rotational isomerism of dialkylureas, that the additional band arises from a form in which the N–H group is out of the skeletal plane.
Surface tension reduction with n,n,n'-trialkyl ureas
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP1094095B1
公开(公告)日:2004-07-28
US6281170B1
申请人:——
公开号:US6281170B1
公开(公告)日:2001-08-28
Conformational preferences in alkylnitrosoureas
作者:John K. Snyder、Leon M. Stock
DOI:10.1021/jo01293a023
日期:1980.2
Photocatalytic Intramolecular C–H Amination Using <i>N</i>-Oxyureas as Nitrene Precursors
作者:Ryan A. Ivanovich、Dilan E. Polat、André M. Beauchemin
DOI:10.1021/acs.orglett.0c02200
日期:2020.8.21
Nitrenes are remarkable high-energy chemical species that enable direct C–N bond formation, typically via controlled reactions of metal-stabilized nitrenes. Here, in contrast, the combined use of photocatalysis with careful engineering of the precursor enabled C–H amination forming imidazolidinones and related nitrogen heterocycles from readily accessible hydroxylamine precursors. Preliminary mechanistic