A simple and efficient palladium-catalyzed intramolecular carbonylativesynthesis of isocoumarins and phthalides from the easily available starting materials by employing phenylformate as a CO surrogate has been achieved. The approach affords target compounds in good to excellent yields with the advantages of lower toxicity, milder conditions, easy operation and wide functional group tolerance.
Design, Synthesis, and Bioactivities of Phthalide and Coumarin Derivatives Based on the Biosynthesis and Structure Simplification of Gossypol
作者:Zhonglin Guo、Pan Zhou、Hongjian Song、Yuxiu Liu、Jingjing Zhang、Yongqiang Li、Qingmin Wang
DOI:10.1021/acs.jafc.1c05792
日期:2021.12.22
structurally complex, we designed and synthesized a series of structurally simpler phthalide and coumarin derivatives. The phthalide derivatives were synthesized by opening the naphthalene ring of hemigossypol, and the coumarin derivatives were synthesized by ring-opening reactions of the phthalide derivatives with the goal of investigating the effect of the lactone ring size on bioactivity. The bioassay results
Hypoxia-activated prodrugs of phenolic olaparib analogues for tumour-selective chemosensitisation
作者:Way W. Wong、Sophia F. O'Brien-Gortner、Robert F. Anderson、William R. Wilson、Michael P. Hay、Benjamin D. Dickson
DOI:10.1039/d3md00117b
日期:——
Hypoxia-activated prodrugs of phenolic olaparib analogues are deactivated in oxic cell culture and cytotoxicity is restored under hypoxia. Temozolomide combination studies suggest a feasible route to PARP inhibitor use beyond synthetic lethality.
Oxidative Cross-Coupling of <i>N</i>-(2‘-Phenylphenyl)benzene- sulfonamides or Benzoic and Naphthoic Acids with Alkenes Using a Palladium−Copper Catalyst System under Air
N-(2'-Phenylphenyl)benzenesulfonamides react with acrylate esters accompanied via cleavage of the C-H bond at their 2'-position in the presence of a catalyst system of Pd(OAc)(2) and Cu(OAc)(2) and a base under air to produce 5,6-dihydro-5-(benzenesulfonyl)phenanthridine-6-acetate derivatives in high yields. The reactions of benzoic acid with butyl acrylate and styrene can also give 3-[(butoxycarbonyl)methyl]phthalide and 3-phenylisocoumarin, respectively.