Reactions of esters of cyclopropylfurancarboxylic acids in the system paraform-hydrogen chloride-zinc chloride and phosphorylation of reaction products
Synthesis of 3-Carbonyl Trisubstituted Furans via Pd-Catalyzed Aerobic Cycloisomerization Reaction: Development and Mechanistic Studies
作者:Amanda A. Barboza、Attilio Chiavegatti Neto、Isac G. Rosset、Guilherme A. M. Jardim、Marco A. B. Ferreira
DOI:10.1021/acs.joc.0c02777
日期:2021.3.5
we report the synthesis of 3-carbonyl-trisubstituted furans via Pd-catalyzed oxidative cycloisomerization reactions of 2-alkenyl-1,3-dicarbonyl scaffolds, using molecular oxygen as the sole oxidant to regenerate active palladium catalytic species, featuring good functional tolerance and mild reaction conditions. Deep investigation of intermediates and transition states of the reaction mechanism were
Reactions of esters of cyclopropylfurancarboxylic acids in the system paraform-hydrogen chloride-zinc chloride and phosphorylation of reaction products
作者:L. M. Pevzner
DOI:10.1007/s11176-005-0134-0
日期:2004.8
Ethyl 2- and 5-cyclopropylfuran-3-carboxylates react with the system comprising Paraform, hydrogen chloride, and zinc chloride to form chloromethyl derivatives. This process is accompanied by selective cleavage of the cyclopropane ring, leading to appearance of a γ-chloropropyl fragment. Phosphorylation of the resulting halides with sodium diethyl phosphite in benzene involves exclusively the chloromethyl group.