Ligand-Controlled Chemoselective C(acyl)–O Bond vs C(aryl)–C Bond Activation of Aromatic Esters in Nickel Catalyzed C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Couplings
converted into the alkylated arenes and ketone products, respectively. The utility of this newly developed protocol was demonstrated by its wide substrate scope, broad functional group tolerance and application in the synthesis of keyintermediates for the synthesis of bioactive compounds. DFT studies on the oxidative addition step helped rationalizing this intriguing reaction chemoselectivity: whereas
[EN] TRIAZOLOPYRIDINE INHIBITORS OF MYELOPEROXIDASE AND/OR EPX<br/>[FR] INHIBITEURS DE LA MYÉLOPEROXYDASE ET/OU DE L'EPX À BASE DE TRIAZOLOPYRIDINES
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2017161145A1
公开(公告)日:2017-09-21
The present invention provides compounds of Formula (I); wherein the substituents are each as defined in the specification, and compositions comprising any of such novel compounds. These compounds are myeloperoxidase (MPO) inhibitors and/or eosinophil peroxidase (EPX) inhibitors, and may be useful for for the treatment and/or prophylaxis of atherosclerosis, heart failure, chronic obstructive pulmonary disease (COPD), and related diseases.
<i>N</i>-Radical Initiated Aminosulfonylation of Unactivated C(sp<sup>3</sup>)–H Bond through Insertion of Sulfur Dioxide
作者:Yuewen Li、Runyu Mao、Jie Wu
DOI:10.1021/acs.orglett.7b02010
日期:2017.9.1
N-Radical initiated aminosulfonylation of unactivated C(sp3)–H bond through insertion of sulfur dioxide in the presence of visible light is reported. O-Aryl oximes react with DABCO·(SO2)2 smoothly at room temperature under blue LED irradiation without any metals or photoredox catalysts, generating diverse 5,6-dihydro-4H-1,2-thiazine 1,1-dioxides in good yield. Additionally, this approach can be extended
据报道,在可见光存在下,通过插入二氧化硫,N-自由基引发了未活化的C(sp 3)-H键的氨基磺酰化反应。室温下,O-芳基肟与DABCO·(SO 2)2在没有任何金属或光氧化还原催化剂的情况下在蓝色LED照射下平稳地反应,在其中生成各种5,6-二氢-4 H -1,2-噻嗪1,1-二氧化物。良品率高。另外,该方法可以扩展到1 H-苯并[ d ] [1,2]噻嗪2,2-二氧化物的合成。在反应过程中,通过用DABCO·(SO 2)处理O-芳基肟来引发N-自由基。2在可见光照射下。随后通过1,5-氢原子转移与附近的C(sp 3)–H键进行氨基磺酰化,并伴有二氧化硫的插入,从而提供1,2-噻嗪1,1-二氧化物衍生物。
The α-alkylation of ketones with alcohols in pure water catalyzed by a water-soluble Cp*Ir complex bearing a functional ligand
作者:Chong Meng、Jing Xu、Yawen Tang、Yao Ai、Feng Li
DOI:10.1039/c9nj03345a
日期:——
A water-soluble dinuclear Cp*Ir complex bearing 4,4′,6,6′-tetrahydroxy-2,2′-bipyrimidine as a bridging ligand was found to be a highly effective catalyst for the α-alkylation of ketones with alcohols in pure water. In the presence of catalyst (0.5 mol%), a series of desirable products were obtained with high reaction economy under environmentally benign conditions. The importance of the hydroxy group