Intramolecular C−H Amination of
<i>N</i>
‐Alkylsulfamides by
<i>tert</i>
‐Butyl Hypoiodite or
<i>N</i>
‐Iodosuccinimide
作者:Kensuke Kiyokawa、Keisuke Jou、Satoshi Minakata
DOI:10.1002/chem.202102635
日期:2021.10.7
1,3-Diamines are an important class of compounds that are broadly found in natural products and are also widely used as building blocks in organic synthesis. Although the intramolecular C−H amination of N-alkylsulfamide derivatives is a reliable method for the construction of 1,3-diamine structures, the majority of these methods involve the use of a transition-metal catalyst. We herein report on a
We have discovered a new class of cooperative catalytic system, consisting of heterogeneous polymer-immobilized bimetallic Pt/Ir alloyed nanoclusters (NCs) and 4-tert-butylcatechol, for the aerobic oxidation of amines to imines under ambient conditions. After optimization, the desired imines were obtained in good to excellent yields with broad substrate scope. The reaction rate was determined to be
Switching the<i>N</i>-Alkylation of Arylamines with Benzyl Alcohols to Imine Formation Enables the One-Pot Synthesis of Enantioenriched α-<i>N</i>-Alkylaminophosphonates
作者:Natalie Hofmann、Kai C. Hultzsch
DOI:10.1002/ejoc.201900209
日期:2019.6.2
The base‐free N‐alkylation of anilines with benzylic alcohols can be switched in favor of imine formation simply by switching between a closed and an open reaction system. Further functionalization of the in situ synthesized imine leads to α‐N‐alkylaminophosphonates via a one‐pot procedure in an atom‐economic fashion.
Borrowing hydrogen methodology for the conversion of alcohols into N-protected primary amines and in situ deprotection
作者:Gareth W. Lamb、Andrew J.A. Watson、Katherine E. Jolley、Aoife C. Maxwell、Jonathan M.J. Williams
DOI:10.1016/j.tetlet.2009.02.129
日期:2009.7
Alcohols have been converted into a range of protected amines including sulfonamides and N-alkylbenzylamine derivatives. Representative examples of deprotection to afford primary amines are also provided.
Oxidation of Amines with CuBr<sub>2</sub>-LiOBu<i><sup>t</sup></i>
作者:Jun-ichi Yamaguchi、Takeshi Takeda
DOI:10.1246/cl.1992.1933
日期:1992.10
The oxidation of secondary amines with copper(II) reagent, prepared from copper(II) bromide and lithium t-butoxide, under mild reaction conditions gave the corresponding imines in high yields. Primary amines were also transformed to the corresponding nitriles.