Acridine Photocatalysis: Insights into the Mechanism and Development of a Dual-Catalytic Direct Decarboxylative Conjugate Addition
作者:Hang T. Dang、Graham C. Haug、Vu T. Nguyen、Ngan T. H. Vuong、Viet D. Nguyen、Hadi D. Arman、Oleg V. Larionov
DOI:10.1021/acscatal.0c03440
日期:2020.10.2
Conjugateaddition is one of the most synthetically useful carbon–carbon bond-forming reactions; however, reactive carbon nucleophiles are typically required to effect the addition. Radical conjugateaddition provides an avenue for replacing reactive nucleophiles with convenient radical precursors. Carboxylicacids can serve as simple and stable radical precursors by way of decarboxylation, but activation
Oleanolic acid and its derivatives: New inhibitor of protein tyrosine phosphatase 1B with cellular activities
作者:Yi-Nan Zhang、Wei Zhang、Di Hong、Lei Shi、Qiang Shen、Jing-Ya Li、Jia Li、Li-Hong Hu
DOI:10.1016/j.bmc.2008.07.080
日期:2008.9
Proteintyrosinephosphatase1B is a key factor in the negative regulation of insulin pathway and a promising target for treatment of diabetes and obesity. Herein, a series of competitive inhibitors were optimized from oleanolic acid, a natural triterpenoid identified against PTP1B by screening libraries of traditional Chinese medicinal herbs. Modifying at 3 and 28 positions, we obtained compound 13