A general study of the iron‐catalyzedreaction of urea with nucleophiles is here presented. The carbamoylation of alcohols allows for the synthesis of N‐unsubstituted (primary) carbamates, including present drugs (Felbamate and Meprobamate), without the necessity to apply phosgene and related derivatives. Using amines as nucleophiles gave rise to the respective mono‐ and disubstituted ureas via selective
Polynuclear Gold [Au<sup>I</sup>
]<sub>4</sub>
, [Au<sup>I</sup>
]<sub>8</sub>
, and Bimetallic [Au<sup>I</sup>
<sub>4</sub>
Ag<sup>I</sup>
] Complexes: C−H Functionalization of Carbonyl Compounds and Homogeneous Carbonylation of Amines
作者:Ekaterina S. Smirnova、José M. Muñoz Molina、Alice Johnson、Nuno A. G. Bandeira、Carles Bo、Antonio M. Echavarren
DOI:10.1002/anie.201603200
日期:2016.6.20
tetranuclear gold complexes, a structurally unprecedented octanuclear complex with a planar [Au(I) 8 ] core, and pentanuclear [Au(I) 4 M(I) ] (M=Cu, Ag) complexes is presented. The linear [Au(I) 4 ] complex undergoes C-H functionalization of carbonyl compounds under mild reaction conditions. In addition, [Au(I) 4 Ag(I) ] catalyzes the carbonylation of primary amines to form ureas under homogeneous conditions
Concise and Additive‐Free Click Reactions between Amines and CF<sub>3</sub>SO<sub>3</sub>CF<sub>3</sub>
作者:Hai‐Xia Song、Zhou‐Zhou Han、Cheng‐Pan Zhang
DOI:10.1002/chem.201901865
日期:2019.8.14
The reactions are rapid, efficient, selective, and versatile, and can be performed in benign solvents, giving products in excellent yields with minimal efforts for purification. The characteristics of the reactions meet the requirements of a click reaction. The use of trifluoromethyl trifluoromethanesulfonate as a click reagent is advantageous over other "CO" sources (e.g., TsOCF3 , PhCO2 CF3 , CsOCF3