TiCl4-Mediated Synthesis of 3,4-Hetero-Disubstituted Isocoumarins by Means of Isocyanide Insertion Reactions
作者:Laurent El Kaïm、Laurence Grimaud、Maxime Vitale、Sudipta Ponra、Aude Nyadanu、Sylvie Maurin
DOI:10.1055/s-0036-1591733
日期:2018.3
Abstract The isocyanideinsertion into sulfanyl-phthalides under Lewis acid conditions is reported with full details. This sequential three-component reaction affords a new straightforward and highly convenient method for the preparation of 3-amino-4-sulfanyl isocoumarins, the potential of which is still unexplored. The isocyanideinsertion into sulfanyl-phthalides under Lewis acid conditions is reported
Divergent synthesis of α-functionalized amides through selective N–O/C–C or N–O/C–C/C–N cleavage of aza-cyclobutanone oxime esters
作者:Hua-Wei Liu、Dian-Liang Wang、Nan-Quan Jiang、Hai-Yan Li、Zhong-Jian Cai、Shun-Jun Ji
DOI:10.1039/d1cc03348d
日期:——
Herein, a novel sequential ring opening reaction of aza-cyclobutanone oxime esters with isocyanides is described. The reaction proceeded smoothly under redox-neutral and mild conditions, leading to a divergent synthesis of α-cyanomethylaminoamides, α-acyloxyamides and α-acylaminoamides. In these transformations, a selective N–O/C–C or N–O/C–C/C–N cleavage was achieved only by changing the iron-catalyst
Efficient One-Pot Synthesis of Unsymmetrical Gold(I) N-Heterocyclic Carbene Complexes and Their Use as Catalysts
作者:A. Stephen K. Hashmi、Yang Yu、Frank Rominger
DOI:10.1021/om2008919
日期:2012.2.13
Eleven different gold(I) complexes of new NHC ligands were prepared in excellent yield, demonstrating the versatility of the new route to NHC complexes. While the influence of electronically different ligands on the synthesis of the catalysts was small, the catalytic activities of the products differed significantly.
The selective addition of organomagnesium reagents to 2,4,6‐trichlorophenyl isocyanide leading to magnesiated aldimines is reported. These aldimines react with Weinreb amides, ketones, or carbonates to provide the corresponding carbonyl derivatives after acidic cleavage. This allows for an efficient synthesis of 1,2‐dicarbonyl compounds and α‐hydroxy ketones.
Copper-Catalyzed<i>N</i>-Aryl-β-enaminonitrile Synthesis Utilizing Isocyanides as the Nitrogen Source
作者:Seoksun Kim、Soon Hyeok Hong
DOI:10.1002/adsc.201400973
日期:2015.3.23
A novel synthetic protocol for N‐aryl‐β‐enaminonitriles, which are useful building blocks for heterocycle synthesis, was developed using isocyanides as the nitrogen source. Using copper‐catalyzed one‐step reactions between isocyanides and benzyl cyanides under mild conditions, diverse N‐aryl‐β‐enaminonitriles could be synthesized in excellent yields and with high atom‐efficiency. N‐Alkyl‐β‐enaminonitriles