Preparation of Unsymmetrical Ketones from Tosylhydrazones and Aromatic Aldehydes via Formyl C–H Bond Insertion
作者:Daniel M. Allwood、David C. Blakemore、Steven V. Ley
DOI:10.1021/ol5011714
日期:2014.6.6
Preparation of ketones by insertion of diazo compounds into the formyl C–H bond of an aldehyde is an attractive procedure, but use of structurally diverse diazo compounds is hampered by preparation and safety issues. A convenient procedure for the synthesis of unsymmetrical ketonesfrom bench-stable tosylhydrazones and aryl aldehydes is reported. The procedure can be performed in one pot from the parent
N-Heterocyclic carbene-catalyzed deaminative cross-coupling of aldehydes with Katritzky pyridinium salts
作者:Inwon Kim、Honggu Im、Hyeonyeong Lee、Sungwoo Hong
DOI:10.1039/d0sc00225a
日期:——
By employing an N-heterocycliccarbene (NHC) catalyst, we developed a versatile catalyticsystem that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts. Katritzky pyridinium salts behave as single-electron oxidants capable of generating alkyl radicals enabled by the redox properties of the enolate form of Breslowintermediates. The resultant alkyl radical
Direct Aldehyde C–H Arylation and Alkylation via the Combination of Nickel, Hydrogen Atom Transfer, and Photoredox Catalysis
作者:Xiaheng Zhang、David W. C. MacMillan
DOI:10.1021/jacs.7b07078
日期:2017.8.23
A mechanism that enables direct aldehyde C–H functionalization has been achieved via the synergistic merger of photoredox, nickel, and hydrogen atom transfer catalysis. This mild, operationally simple protocol transforms a wide variety of commercially available aldehydes, along with aryl or alkyl bromides, into the corresponding ketones in excellent yield. This C–H abstraction coupling technology has
A scalable and efficient method suitable for the preparation of a wide variety of ketones via new intermediate V has been developed.
开发了一种可扩展且高效的方法,适用于通过新的中间体V制备多种酮。
1,4-dicarbonyl-piperidyl derivatives
申请人:Merck Patent GmbH
公开号:US10570116B2
公开(公告)日:2020-02-25
Compounds of the formula I
in which Z, W, Q, R and Y have the meanings indicated in claim 1, are inhibitors of Tankyrase, and can be employed, inter alia, for the treatment of diseases such as cancer, cardiovascular diseases, central nervous system injury and different forms of inflammation.
式 I 的化合物
其中 Z、W、Q、R 和 Y 的含义如权利要求 1 所示,是 Tankyrase 的抑制剂,可用于治疗癌症、心血管疾病、中枢神经系统损伤和不同形式的炎症等疾病。