Nickel-Catalyzed Reductive Addition of Aryl/Benzyl Halides and Pseudohalides to Carbodiimides for the Synthesis of Amides
作者:Farhad Panahi、Fereshteh Jamedi、Nasser Iranpoor
DOI:10.1002/ejoc.201501349
日期:2016.2
A Nickel-catalyzed reductive process is described for the directamidation of benzyl and aryl halides using carbodiimides as the amidating agent. Moreover, aryl and benzyl C–O electrophiles such as triflate, acetate, tosylate, trityl ether, and pivalate were converted into amides using this method. The in-situ-generated Ni0 acts as a catalyst for the reaction at room temperature for benzylic substrates
A Facile Entry to Fused Pyrimidines: Preparation of Pyrimido(4,5-<i>b</i>]quinoline and Pyrido(2,3-<i>d</i>: 6,5-<i>d</i>′]dipyrimidine Derivatives
作者:Pedro Molina、Maria Jesús Vilaplana、Aurelia Pastor
DOI:10.1055/s-1992-26236
日期:——
A number of pyrimido[4,5-b]quinolines 3 and pyrido[2,3-d:6,5-d]-dipyrimidines have been prepared by reaction of N,N-disubstituted barbituric acids with the iminophosphorane derived from o-azidobenzaldehyde or 6-amino-5-formyl-1,3-dimethyluracil.
Darstellung von 2-Amino-imidazolen mit acylierten Carbodiimiden 7. Mitt. über Carbodiimide
作者:K. Hartke
DOI:10.1002/ardp.19662991106
日期:——
Acetylierte Carbodiimide (I) setzen sich bei Raumtemperatur mit Aminoacetaldehyd‐diäthylacetal zu Acetylguanidinen (II) um. Letztere lassen sich durch Kochen mit verd. Salzsäure in 1‐Alkyl‐2‐alkylaminoimidazole (III) überführen, deren Struktur durch spektroskopische Daten bewiesen wird.
<i>N</i>-Heterocyclic Carbene Catalyzed Oxidative Coupling of Aldehydes with Carbodiimides under Aerobic Conditions: Efficient Synthesis of <i>N</i>-Acylureas
The oxidativecoupling reaction of aldehydes with N,N′-disubstituted carbodiimides catalyzed by N-heterocyclic carbenes under aerobic conditions has been achieved. This reaction gives the corresponding N-acylurea derivatives in good to high yields. Various kinds of aldehydes including aliphatic ones and carbodiimides are applicable to this reaction.