One-Pot Synthesis of 2-Substututed 3-Thioxo-2,3-dihydro-1H-isoindol-1-ones by the Reaction of N-Substituted 2,N-Dilithiobenzamides with Isothiocyanates
摘要:
This paper describes an efficient one-pot method for the preparation of 2-substituted 3-thioxo-1H-isoindol-l-ones (3-thioxoisoindolinones) by the reaction of N-substituted 2,N-dilithiobenzamides, generated by treating N-substituted benzamides with two equivalents of butyllithium, with the respective isothiocyanates followed by ring closure of the resulting N-alkyl(or aryl)-2-(alkyl(or aryl)thiocarbamoyl)benzamide derivatives with loss of alkyl(or aryl)amines.
A phosphine-free Pd catalyst for the selective double carbonylation of aryl iodides
作者:Verónica de la Fuente、Cyril Godard、Ennio Zangrando、Carmen Claver、Sergio Castillón
DOI:10.1039/c2cc17124d
日期:——
The first phosphine-free Pd-catalysed double carbonylation of aryl iodides is reported as a general and practical method, giving excellent conversions and selectivities for a wide range of aryl iodides and amine nucleophiles under atmospheric CO pressure.
Aminocarbonylations Employing Mo(CO)<sub>6</sub> and a Bridged Two-Vial System: Allowing the Use of Nitro Group Substituted Aryl Iodides and Aryl Bromides
作者:Patrik Nordeman、Luke R. Odell、Mats Larhed
DOI:10.1021/jo302322w
日期:2012.12.21
A bridged two-vial system aminocarbonylation protocol where Mo(CO)6 functions as an external in situ solid source of CO has been developed. For the first time both nitro group containing aryl/heteroaryl iodides and bromides gave good to excellent yields in the Mo(CO)6-mediated and palladium(0)-catalyzed conversion to benzamides, while the identical one-vessel protocol afforded extensive reduction of
divergent cyclization of benzamides, which leads to perfluorinated or cyanated isoquinolinediones, is developed. In the presence of AIBN, methacryloyl benzamides with perfluoroalkyl iodides undergo cascade radical addition/cyclization to afford perfluoroinated isoquinolinediones as the major product under metal-free conditions, whereas the use of CuI (10 mol%) is able to redirect the cyclization to yield
Mixing <i>O</i>-Containing and <i>N</i>-Containing Directing Groups for C–H Activation: A Strategy for the Synthesis of Highly Functionalized 2,2′-Biaryls
N-containing directing groups has been developed for the synthesis of 2,2′-biaryl via Pd-mediated C–Hbond activation and oxidative coupling. This new transformation may proceed through a mechanism involving Pd(II) and Pd(IV) intermediates. We found the use of PTSA and HFIP to be critical for the reaction and suggest that these reagents could serve as efficient ligands for this C–Cbond formation. This
Highly Selective Palladium-Catalysed Aminocarbonylation of Aryl Iodides using a Bulky Diphosphine Ligand
作者:Verónica de la Fuente、Cyril Godard、Carmen Claver、Sergio Castillón
DOI:10.1002/adsc.201200114
日期:2012.7.9
the synthesis of amides via palladium‐catalysed aminocarbonylation of aryliodides is reported using the bulky cis‐1,2‐bis[(di‐tert‐butylphosphino)methyl]cyclohexane ligand under atmospheric pressure of carbon monoxide. Excellent conversions (up to 99%) and chemoselectivities (up to 99%) were obtained for a range of aryliodides and amine nucleophiles. The effect of the substituents on the substrate