Mild and Efficient Cobalt-Catalyzed Cross-Coupling of Aliphatic Amides and Aryl Iodides in Water
作者:Yong-Chua Teo、Bryan Tan
DOI:10.1055/s-0034-1380724
日期:——
convenient protocol for the C–N cross-coupling of aliphatic amides and iodobenzene is demonstrated using a simple and inexpensive Co(C2O4)·2H2O/N,N′-dimethylethylenediamine (DMEDA) catalytic system in water. Good yields of N-arylated products were isolated (up to 85%) and the protocol has been successfully applied to the synthesis of the anticancer drug, flutamide.
Catalytic direct amidations in <i>tert</i>-butyl acetate using B(OCH<sub>2</sub>CF<sub>3</sub>)<sub>3</sub>
作者:Charlotte E. Coomber、Victor Laserna、Liam T. Martin、Peter D. Smith、Helen C. Hailes、Michael J. Porter、Tom D. Sheppard
DOI:10.1039/c9ob01012b
日期:——
polar carboxylic acid and amine substrates. As a consequence, most catalytic amidation protocols are unsuccessful when applied to polar and/or functionalised substrates of the kind commonly used in medicinal chemistry. In this paper we report a practical and useful catalytic direct amidation reaction using tert-butyl acetate as the reaction solvent. The use of an ester solvent offers improvements in terms
The trifluoroacetic acid (TFA) mediated hydration of ynamides was developed, which is an efficient approach for the synthesis of N-monosubstituted amides. This convenient method is effective with a wide range of substrates under room temperature condition, and the products are obtained in high to excellent yields through an easy work-up process.