Cascade reactions of nitrogen-substituted isocyanates: a new tool in heterocyclic chemistry
作者:Jean-François Vincent-Rocan、Ryan A. Ivanovich、Christian Clavette、Kyle Leckett、Julien Bejjani、André M. Beauchemin
DOI:10.1039/c5sc03197d
日期:——
In contrast to normal C-substituted isocyanates, nitrogen-substituted isocyanates (N-isocyanates) are rare. Their high reactivity and amphotheric nature has prevented the scientific community from exploiting their synthetic potential. Recently, we have...
A Cascade Synthesis of Aminohydantoins Using In Situ-Generated<i>N</i>-Substituted Isocyanates
作者:Jean-François Vincent-Rocan、Christian Clavette、Kyle Leckett、André M. Beauchemin
DOI:10.1002/chem.201405648
日期:2015.3.2
building blocks for the development of cascade reactions in heterocyclic synthesis. These reactive amphoteric intermediates can be accessed in situ via an equilibrium that allows controlled reactivity in the presence of bifunctional partners such as α‐amino esters. A cascade reaction has been carried out that forms 3‐aminohydantoin derivatives using simple phenoxycarbonyl derivatives of hydrazides and
Synthesis and Reactivity of Unsymmetrical Azomethine Imines Formed Using Alkene Aminocarbonylation
作者:Wei Gan、Patrick J. Moon、Christian Clavette、Nicolas Das Neves、Thomas Markiewicz、Amy B. Toderian、André M. Beauchemin
DOI:10.1021/ol400542b
日期:2013.4.19
Complex cyclic azomethine imines possessing a beta-aminocarbonyl motif can be accessed readily from simple alkenes and hydrazones. This alkene aminocarbonylation approach allows formation of ketone-derived azomethine imines of unprecedented complexity. Since unsymmetrical hydrazones are used, two stereoisomers are formed: the reactivity of chiral derivatives is explored in both intra- and intermolecular systems.