Synthesis and antitumour activities of a novel class of dehydroabietylamine derivatives
摘要:
Structural modification is still a popular and important route in the forest chemical field for finding novel tricyclic diterpenes with more potential bioactivities and broad bioactive spectra. In this study, a series of dehydroabietylamine derivatives containing tricyclic diterpene structures were synthesised through oxidation in the 7th position of ring B and nitrification in the 12th position of ring C using dehydroabietylamine as the starting material. Structures of the synthesised compounds were confirmed by IR, H-1-NMR, C-13-NMR, MS and HRMS. The cytotoxicities of these compounds against PC-3 (human prostate carcinoma cell line) and Hey-1B (human ovarian carcinoma cell line) cells by the MTT assay were investigated. The results showed that the presence of a nitro group at 12th position and a carbonyl group at 7th position resulted in an increase of cytotoxic activity. Our findings present more evidence, showing the relationship between the chemical structure and biological function.
Dimethyl carbonate (DMC), an environment-friendly compound prepared from CO2, shows diverse reactivities. In this communication, an efficient procedure using DMC as both a C1 building block and solvent in the aminocarbonylation reaction with nitrocompounds has been developed. W(CO)6 acts both a CO source and a reductant here.
Palladium-catalyzed Heck/aminocarbonylation of alkene-tethered carbamoyl chlorides with nitro compounds for the synthesis of carbamoyl-substituted oxindoles
A straightforward and efficient approach for the synthesis of carbamoyl-substituted oxindoles has been developed via a palladium-catalyzed Heck cyclization and reductive aminocarbonylation reaction of alkene-tethered carbamoyl chlorides with nitro compounds. The reaction showed good compatibility toward versatile functional groups, and both nitroarenes and nitroalkanes were well tolerated. Using Mo(CO)6
Synthesis of amides-substituted 2H-benzopyrans through palladium-catalyzed one-pot aminocarbonylation reaction with nitro compounds as the nitrogen sources
An efficient and straightforward procedure toward the synthesis of amides-substituted 2-benzopyrans has been explored throughpalladium-catalyzed one-pot aminocarbonylation reaction. By using nitro compounds as attractive nitrogen sources, with Mo(CO) as both CO source and reductant, a variety of amides-containing 2-benzopyrans were obtained in moderate to high yields with good functional group tolerance