Pd-Catalyzed, Cu(I)-Mediated Cross-Couplings of Bisarylthiocyclobutenediones with Boronic Acids and Organostannanes
摘要:
Bisarylthiocyclobutenedione 7 reacted smoothly with a variety of both organostannanes and (hetero)arylboronic acids in the presence of a catalytic amount of Pd and a stoichiometric amount of CuTC to produce symmetrical disubstituted cyclobutenediones in yields that range from 37 to 94% (18 examples).
Oxokohlenstoffe und verwandte Verbindungen; 16. Mitteilung1. Synthese von 3-Alkylthio- und 3-Arylthio-3-cyclobuten-1,2-dionen (Thiosemiquadratsäure-S-estern)