A sensitive amine-responsive disassembly of self-assembled AuI -CuI double salts was observed and its utilization for the synergistic catalysis was enlightened. Investigation of the disassembly of [Au(NHC)2 ][CuI2 ] revealed the contribution of Cu-assisted ligand exchange of N-heterocyclic carbene (NHC) by amine in [Au(NHC)2 ]+ and the capacity of [CuI2 ]- on the oxidative step. By integrating the
Hydroamination and Hydrophosphination of Isocyanates/Isothiocyanates under Catalyst‐Free Conditions
作者:Xiancui Zhu、Mengchen Xu、Jinrong Sun、Dianjun Guo、Yiwei Zhang、Shuangliu Zhou、Shaowu Wang
DOI:10.1002/ejoc.202100932
日期:2021.10.7
Various ureas, thioureas, phosphathioureas and their chiral analogues were synthesized in good to excellent yields by the hydroamination and hydrophosphination of isocyanates/isothiocyanates under catalyst-free conditions.
no-4-phenylamino-pyrrolin-2,5-dion (12) has been determined by X-ray crystallography. The pyrrolin-2,5-diones have been applied as planar, chiral N,N-ligands to modify the [Rh(COD)Cl]2 catalyst in the asymmetrichydrosilylation reaction of acetophenone. However, the optical induction observed for this reaction are poor for N,N-ligands as compared to the corresponding P,P-ligands.
Ruthenium-Catalyzed Urea Synthesis Using Methanol as the C1 Source
作者:Seung Hyo Kim、Soon Hyeok Hong
DOI:10.1021/acs.orglett.5b03328
日期:2016.1.15
An unprecedented protocol for urea synthesis directly from methanol and amine was accomplished. The reaction is highly atom-economical, producing hydrogen as the sole byproduct. Commercially available ruthenium pincer complexes were used as catalysts. In addition, no additive, such as a base, oxidant, or hydrogen acceptor, was required. Furthermore, unsymmetrical ureaderivatives were successfully
Carbondioxide is regarded as a reliable C1 building block in organic synthesis because of the nontoxic, abundant, and economical characteristics of carbondioxide. In this manuscript, a commercially available oxovanadium(V) compound was demonstrated to serve as an efficientcatalyst for the catalytic amination of carbondioxide under ambientpressure in the synthesis of ureas. The catalytic transformation
由于二氧化碳无毒、丰富、经济的特点,二氧化碳被认为是有机合成中可靠的C1结构单元。在这份手稿中,一种市售的氧钒 ( V ) 化合物被证明可作为一种有效的催化剂,用于在环境压力下合成尿素中的二氧化碳催化胺化。还进行了手性胺催化转化为相应的手性脲而不丧失手性。此外,在环境压力下成功实现了克级催化尿素合成,以验证这种二氧化碳催化活化的可扩展性。