Palladium-Catalyzed Intermolecular Azidocarbonylation of Alkenes via a Cooperative Strategy
作者:Ming Li、Feng Yu、Pinhong Chen、Guosheng Liu
DOI:10.1021/acs.joc.7b01812
日期:2017.11.17
alkene activation and palladium-catalyzed carbonylation was demonstrated as an efficient strategy for the difunctionalization of alkenes. A variety of β-azido carboxylic esters were obtained from mono- and 1,1-disubstituted terminal alkenes with excellent regioselectivities. In addition, the introduced azido group can be reduced to an amine group, providing a facile access to β-aminoacid derivatives
The present invention relates to compounds, to processes for preparing them, to pharmaceutical compositions comprising them, and to their use in the therapy and/or prophylaxis in illnesses in people or animals, especially diseases of bacterial infection.
Carboxylic Acid O–H Insertion Reaction of β-Ester Diazos Enabling Synthesis of β-Acyloxy Esters
作者:Ziyi Li、Xinyu Yao、Xin Zhang、Haibo Mei、Jianlin Han
DOI:10.1021/acs.joc.2c02023
日期:2022.11.18
β-ester diazos and their applications in carboxylic acid O–H insertion reactions have been reported, which afford β-acyloxy esters in excellent yield. Varieties of aryl- and alkyl-substituted diazos are well tolerated in this insertion reaction under mild and convenient conditions. Moreover, structural modification of the natural product and molecular drug can also be achieved in this reaction. This
Synthesis and biological evaluation of 3-phenyl-3-aryl carboxamido propanoic acid derivatives as small molecule inhibitors of retinoic acid 4-hydroxylase (CYP26A1)
All-trans-retinoic acid (ATRA), the biologically active metabolite of vitamin A, is used medicinally for the treatment of hyperproliferative diseases and cancers. However, it is easily metabolized. In this study, the leading compound S8 was found based on virtual screening. To improve the activity of the leading compound S8, a series of novel S8 derivatives were designed, synthesized and evaluated for their in vitro biological activities.All of the prepared compounds showed that substituting the 5-chloro-3-methyl-1-phenyl-1H-pyrazole group for the 2-tertbutyl-5-methylfuran scaffold led to a clear increase in the biological activity. The most promising compound 32, with a CYP26A1 IC50 value of 1.36 mu M (compared to liarozole (IC50 = 2.45 mu M) and S8 (IC50 = 3.21 mu M)) displayed strong inhibitory and differentiation activity against HL60 cells. In addition, the study focused on the effect of beta-phenylalanine, which forms the coordination bond with the heme of CYP26A1. These studies suggest that the compound 32 can be used as an appropriate candidate for future development. (C) 2014 Elsevier Ltd. All rights reserved.