Diastereoselective Access to Seven-Membered Benzosultams via Palladium-Catalyzed Ring-Opening [3 + 2]-Annulation.
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DOI: 10.1021/acs.orglett.3c01422
Abstract: A palladium-catalyzed ring-opening [3 + 2]-annulation of spirovinylcyclopropanyl oxindoles with seven-membered cyclic N-sulfonylimines has been developed. A wide range of seven-membered benzosultams featuring both a quaternary center and axially chiral biaryl scaffolds have been afforded… read more here.
Keywords: membered benzosultams; palladium catalyzed; seven membered; opening annulation ... See more keywords
Solvent-Free Tandem Reaction of P(O)–OH and an Epichlorohydrocarbon for Controllable O-Alkylation through a Ring-Opening and Annulation Process
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DOI: 10.1055/s-0042-1751448
Abstract: We report an efficient additive- and solvent-free O-alkylation of P(O)–OH compounds with epichlorohydrocarbons for the synthesis of epoxy-group-containing phosphinates. The transformation proceeds through a tandem reaction involving ring-opening and annulation processes. The ring-opened products and… read more here.
Keywords: reaction; solvent free; alkylation; opening annulation ... See more keywords