Iron-Catalyzed Acylation of Polyfunctionalized Aryl- and Benzylzinc Halides with Acid Chlorides
作者:Andreas D. Benischke、Marcel Leroux、Irina Knoll、Paul Knochel
DOI:10.1021/acs.orglett.6b01677
日期:2016.8.5
FeCl2 (5 mol %) catalyzes a smooth and convenient acylation of functionalized arylzinc halides at 50 °C (2–4 h) and benzylic zinc chlorides at 25 °C (0.5–4 h) with a variety of acidchlorides leading to polyfunctionalized diaryl and aryl heteroaryl ketones.
zed carbonylations involved either toxic carbon monoxide (CO) gas as carbonylating agent or functional-group-assisted ortho sp2 C–H activation (i.e., ortho acylation) or carbonylation by activation of the carbonyl group (i.e., via the formation of enamines). Contradicting these methods, here we describe an environmentally benign process, [Pd]-catalyzed direct carbonylation starting from simple and
Divergent Synthesis of Highly Substituted Pyridines and Benzenes from Dienals, Alkynes, and Sulfonyl Azides
作者:Han Luo、You Li、Luan Du、Xiaolan Xin、Tao Wang、Jingpeng Han、Yi Tian、Baosheng Li
DOI:10.1021/acs.orglett.1c02900
日期:2021.10.15
Divergent synthesis is extremely important for the highly efficient preparation of structurally diverse target molecules. Herein, we describe a multicomponent cascade reaction, which allows access to highly substituted pyridines and benzenes by combining four individual steps in a one-pot manner from the same set of readily available starting materials. The azepine intermediates were first used as