Benzofused lactams, especially indolin‐2‐one and dihydroquinolin‐2‐one are popular structural motives in durgs and natural products. Herein, we developed a room temperature and robust synthesis of benzofused lactams through cobalt(III)‐catalyzed C(sp2)−H amidation. In this protocol, in‐situ formation of Cp*Co(III)(ligand) catalyst from Cp*Co(CO)I2 and ligand simplify the synthetic effort of cobalt
Herein, a photocatalyzed, intramolecular C(sp2)−H amidation of N-benzoyloxyamides has been developed to afford δ-benzolactams with an aryl-alkyl σ-bond relocation. Upon the formation of amidyl radical via reductive N−O bond cleavage, selective radical ipso-addition followed by a redox-neutral radical–polar crossover was suggested to be responsible for the preferential C−C bond migration.
Syntheses and anti-inflammatory and analgesic activities of hydroxamic acids and acid hydrazides.
作者:KUNIYOSHI TANAKA、KEIZO MATSUO、AI NAKANISHI、TOSHIKO HATANO、HISAKO IZEKI、YOKO ISHIDA、WASUKE MORI
DOI:10.1248/cpb.31.2810
日期:——
On the basis of the generally accepted view that copper ions take part in the occurrence of inflammation, hydroxamic acids and acid hydrazides derived from various substituted cinnamic acids and hydrocinnamic acids, which were expected to chelate with copper ions, were synthesized and evaluated for anti-inflammatory activity by the carrageenin-induced rat paw edema assay and for analgesic activity by the phenylquinone writhing method in mice. Some of the synthesized compounds exhibited both activities, and 3-(3, 4-dimethoxyphenyl)propiohydroxamic acid and its Zn complex were more active than aspirin. The Cu (II) complexes of hydroxamic acid derivatives were synthesized and were assumed to have polymeric structures from the results of elemental analysis, molecular weight measurement and determination of magnetic susceptibility.
METHOD FOR PRODUCING LACTAM COMPOUND, AND LACTAM COMPOUND PRODUCED THEREBY
申请人:INSTITUTE FOR BASIC SCIENCE
公开号:US20200331871A1
公开(公告)日:2020-10-22
The present invention relates to a method for producing a lactam compound from dioxazolone in the presence of a catalyst having a particular ligand, and to a lactam compound produced thereby, and can produce a lactam compound with excellent selectivity and an excellent yield by using the combination of a starting material having a particular functional group and a particular catalyst having a particular ligand.
mechanochemical approach towards 3,4-dihydro-2(1H)-quinolinones by catalysis with FeBr3 has been developed. The solvent-free processes start from readily available dioxazolones, which undergo intramolecularamidation reactions providing the products in good to very high yields. Practically, the reactions are easy to perform, proceed within a short period of time and require only standard ball milling equipment
开发了一种通过 FeBr 3催化制备 3,4-二氢-2(1 H )-喹啉酮的机械化学方法。无溶剂工艺从容易获得的二恶唑酮开始,它经历分子内酰胺化反应,以良好到非常高的产率提供产品。实际上,反应很容易进行,在短时间内进行,并且只需要标准的球磨设备。