185329-74-2Relevant academic research and scientific papers
Metal-Free Aerobic Oxidative C–O Coupling of C(sp3)–H with Carboxylic Acids Catalyzed by DDQ and tert-Butyl Nitrite
Pan, Decheng,Pan, Zilong,Hu, Zhiming,Li, Meichao,Hu, Xinquan,Jin, Liqun,Sun, Nan,Hu, Baoxiang,Shen, Zhenlu
, p. 5650 - 5655 (2019/08/20)
The formation of the C–O bond is one of the hot topics in the area of C(sp3)–H bond functionalization. A metal-free oxidative cross-coupling between benzylic C(sp3)–H bond and carboxylic acids has been developed. The reactions were performed with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as the catalyst, tert-butyl nitrite (TBN) as the co-catalyst, and molecular oxygen as the terminal oxidant. A variety of diarylmethanes could be successfully coupled with various carboxylic acids to obtain diarylmethanol esters in good to excellent yields. In addition, 2-benzylbenzoic acids could be converted into phthalides in moderate yields through an intramolecular oxidative cyclization.
Thiophenesulfonamides as endothelin receptor antagonists
Raju,Wu, Chengde,Kois, Adam,Verner, Erik,Okun, Ilya,Stavros, Fiona,Chan, Ming Fai
, p. 2651 - 2656 (2007/10/03)
The synthesis and in vitro binding affinities of a series of thiophenesulfonamides as ET(A) selective endothelin receptor antagonists is described. The most potent inhibitor displayed an IC50 of 43 nM and 3 μM to ET(A) and ET(B) receptors, respectively.
