[EN] PROCESS FOR THE SYNTHESIS OF BETA-AMINOCARBONYLS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE BÉTA-AMINOCARBONYLES
申请人:UNIV OTTAWA
公开号:WO2013067646A1
公开(公告)日:2013-05-16
The present application provides processes and intermediates useful in the production of β- aminocarbonyl- or β-aminothiocarbonyl-containing compounds. Provided herein is a process for synthesizing β-aminocarbonyl- or β-aminothiocarbonyl-containing compounds from an alkene and a hydrazone. Also provided herein is a process for synthesizing β-aminocarbonyl- or β-aminothiocarbonyl-containing compounds from an alkene and a hydrazine. The present application further provides intermediate aminoisocyanate and iminoisocyanate compounds, and methods for synthesizing the starting hydrazone and hydrazine compounds.
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 Practical Approach to Semicarbazone and Hydrazone Derivatives via Imino-isocyanates
作者:Keira Garland、Wei Gan、Charlotte Depatie-Sicard、André M. Beauchemin
DOI:10.1021/ol4016089
日期:2013.8.16
Complex hydrazone derivatives can be accessed readily from hydrazones upon heating in the presence of nucleophiles. This reactivity likely involves imino-isocyanate intermediates, and a variety of leaving groups can be used at temperatures ranging from 20 to 150 °C. Alcohols, thiols, primary, and secondary amines can be used as nucleophiles, thus providing a simple alternative to the synthesis of hydrazones
Diversity-oriented heterocyclic synthesis using divergent reactivity of N-substituted iso(thio)cyanates
作者:Jean-François Vincent-Rocan、Joshua S. Derasp、André M. Beauchemin
DOI:10.1039/c5cc07212c
日期:——
Carbon-substituted isocyanates and isothiocyanates are common building blocks in organic synthesis. In contrast, synthetic uses of N-substituted isocyanates and isothiocyanates are severely underdeveloped: few have been reported and their reactivity...
Modular Synthesis of Pyrazolones Using an Alkene Aminocarbonylation Reaction
作者:Kaitlyn Lavergne、Amanda Bongers、Lyanne Betit、André M. Beauchemin
DOI:10.1021/acs.orglett.5b01719
日期:2015.7.17
A variety of pyrazolones were synthesized from enol ethers and hydrazones using a reaction sequence involving aminocarbonylation of enol ethers followed by nucleophile-induced aromatization of the azomethine iminesintermediates. Using bases to catalyze the in situ formation of imino isocyanates allowed alkene aminocarbonylation to proceed under milder conditions with reactive substrates and enabled