Unexpected manganese(iii) acetate-mediated reactions of β-enamino carbonyl compounds with 1-(pyridin-2-yl)-enones under mechanical milling conditions
作者:Zi Liu、Guang-Peng Fan、Guan-Wu Wang
DOI:10.1039/c2cc36360g
日期:——
The solvent-free reactions of beta-enamino carbonylcompounds with 1-(pyridin-2-yl)-enones in the presence of manganese(iii) acetate dihydrate unexpectedly afforded 2-acyl-3-aryl-6,7-dihydro-4(5H)-benzofuran derivatives under mechanical milling conditions.
Divergent Acyl and Decarbonylative Liebeskind–Srogl Cross-Coupling of Thioesters by Cu-Cofactor and Pd–NHC (NHC = N-Heterocyclic Carbene) Catalysis
作者:Shiyi Yang、Xiang Yu、Michal Szostak
DOI:10.1021/acscatal.2c05550
日期:2023.2.3
cross-coupling reactions of thioesters by selective acyl C(O)–S cleavage have emerged as a powerful platform for the preparation of complex molecules. Herein, we report divergent Liebeskind–Srogl cross-coupling of thioesters by Pd–NHC (NHC = N-heterocycliccarbene) catalysis. The reaction provides straightforward access to functionalized ketones by highly selective C(acyl)–S cleavage under mild conditions. Most
Bifunctional chiralsquaramide-catalyzedhighlyenantioselectiveMichaeladdition of nitromethane to diverse 2-enoylazaarenes was successfully performed. This protocol provided a set of chiral azaarene-containing γ-nitroketones with up to 98% yield and 98% ee in a solvent-free catalytic system under mild conditions. Furthermore, gram-scale synthetic utility was also showcased.