Effective Preparation of O-Succinimidyl-2- (tert-butoxycarbonylamino)ethylcarbamate Derivatives from β-Amino Acids. Application to the Synthesis of Urea-Containing Pseudopeptides and Oligoureas
Novel stabilized activated derivatives of carbamic acid, their process of preparation and their use for the preparation of ureas
申请人:——
公开号:US20020143191A1
公开(公告)日:2002-10-03
Process for the preparation of stable activated derivatives of carbamic acid, comprising at least one protected amino group and an activated carbamic acid function, from an amino acid derivative in which the amino group is protected. The process includes: a) a step of transformation of the —COOH group of the amino acid derivative into a —CON
3
group to obtain an acyl azide; b) a step of transformation of the —CON
3
group of the acyl azide into a —NCO group to obtain an isocyanate; c) a step of treating the isocyanate to obtain a stable derivative of carbamic acid.
Conformational cooperativity between helical domains of differing geometry in oligoamide–oligourea foldamer chimeras
作者:Julien Maury、Bryden A. F. Le Bailly、James Raftery、Jonathan Clayden
DOI:10.1039/c5cc02995c
日期:——
Two foldamer domains of different classes (urea and amide) remain in conformational communication, and adopt a well-defined global structure in solution, provided the interdomain hydrogen-bonds are suitably orientated.
Effective Preparation of <i>O</i>-Succinimidyl-2- (<i>tert</i>-butoxycarbonylamino)ethylcarbamate Derivatives from β-Amino Acids. Application to the Synthesis of Urea-Containing Pseudopeptides and Oligoureas