A procedure on palladium-catalyzed selective aminocarbonylation of styrenes with nitroarenes for the synthesis of α,β-unsaturatedamides has been developed. A range of substituted α,β-unsaturatedamides were synthesized in moderate to good yields. Interestingly, nitroarenes act as both a nitrogen source and oxidant, and Mo(CO)6 acts as a solid CO source and reductant in this catalytic system.
<scp>Iron‐Catalyzed</scp> Amide Bond Formation from Carboxylic Acids and Isocyanates<sup>†</sup>
作者:Lingjian Zi、Jing Zhang
DOI:10.1002/cjoc.202300396
日期:2023.12
We describe an iron-catalyzed amidebondformation from readily available carboxylic acids and isocyanates. This method utilizes an abundant and biocompatible iron catalyst and easily accessible starting materials, generates CO2 as the only byproduct, and features broad substrate scopes with good functional group compatibility. Therefore, it provides a cost-effective and practical protocol to access
Direct transformation of arylpropynes to acrylamides via a three-step tandem reaction
作者:Jun Qiu、Ronghua Zhang
DOI:10.1039/c3ob42444h
日期:——
arylpropynes and hydroxylamine hydrochloride through sp3 C–H and C–C bond cleavage has been achieved with DDQ as an oxidant. The mechanistic study shows that the acrylamides are formed through a three-step tandem sequence, including cross-dehydrogenative-coupling (CDC) reaction, aza-Meyer–Schuster rearrangement and Beckmannrearrangement.