Iron(III) Corroles and Porphyrins as Superior Catalysts for the Reactions of Diazoacetates with Nitrogen- or Sulfur-Containing Nucleophilic Substrates: Synthetic Uses and Mechanistic Insights
作者:Iris Aviv、Zeev Gross
DOI:10.1002/chem.200701885
日期:2008.4.28
A thorough mechanistic investigation has been performed on the reactions of primary and secondary amines with diazoacetates, which proceed uniquely quickly and efficiently when catalyzed by iron(III) corroles and porphyrins. Two major differences in relation to other metal-based catalysts are that the iron complexes are not poisoned by excess amine and that metal-carbene intermediates are apparently
Process for making Boc-protected 3-aminohydantoins/thiohydantoins and 3-aminodihydrouracils/dihydrothiouracils
申请人:The Procter & Gamble Company
公开号:US06784293B1
公开(公告)日:2004-08-31
The present invention provides a process for the efficient assembly of Boc-protected 3-aminohydantoins/thiohydantoins and 3-aminodihydrouracils/dihydrothiouracils via a one-pot solution phase or solid phase synthesis from readily available starting materials.
A highly efficient copper-catalyzed asymmetric insertion of α-diazoesters into N−H bonds has been realized by using chiral spiro bisoxazoline ligands, affording α-amino acid derivatives in high yields with excellent enantioselectivities.
Iron-Catalyzed Cyanoalkylation of Glycine Derivatives Promoted by Pyridine-Oxazoline Ligands
作者:Dengfu Lu、Jiajia Cui、Sen Yang、Yuefa Gong
DOI:10.1021/acscatal.1c00557
日期:2021.4.2
An iron-catalyzed C(sp3)–H cyanoalkylation of glycinederivatives with cyclobutanone oxime esters was established for the incorporation of a cyano group into amino acids and peptides. In this reaction, Fe(NTf2)2 and pyridine-oxazoline ligands form highly active catalysts that could simultaneously and selectively activate both substrates. Preliminary mechanistic studies revealed the excellent chemo-selectivity
What Happens When the Terminal Aromatization is Blocked? Construction of 1,2-Dihydroquinoline Derivatives by<i>sp</i><sup>3</sup>CH Bond Oxidation of<i>N</i>-Arylalaninates
作者:Shiwei Lü、Yingzu Zhu、Xingge Ma、Xiaodong Jia
DOI:10.1002/adsc.201500885
日期:2016.3.31
aromatization‐blocked strategy, the 1,2‐dihydroquinoline skeleton was efficiently constructed by sp3 CH bond oxidation of N‐arylalaninates under catalytic radical cation salt‐promoted conditions. Investigation of the reaction scope shows broad generality and good functional group tolerance. This method provides a new way to synthesize 1,2‐dihydroquinoline derivatives from easily accessible starting materials