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)
SCHMIDT, ARTHUR H.;KUNZ, CHRISTIAN;DEBO, MICHAEL;MORA-FERRER, JUAN-PABLO, SYNTHESIS,(1990) N, C. 819-822
作者:SCHMIDT, ARTHUR H.、KUNZ, CHRISTIAN、DEBO, MICHAEL、MORA-FERRER, JUAN-PABLO
DOI:——
日期:——
Oxokohlenstoffe und verwandte Verbindungen; 16. Mitteilung<sup>1</sup>. Synthese von 3-Alkylthio- und 3-Arylthio-3-cyclobuten-1,2-dionen (Thiosemiquadratsäure-<i>S</i>-estern)
作者:Arthur H. Schmidt、Christian Künz、Michael Debo、Juan-Pablo Mora-Ferrer
DOI:10.1055/s-1990-27025
日期:——
Oxocarbons and Related Compounds; Part 16.1 Synthesis of 3-Alkylthio- and 3-Arylthio-3-cyclobutene-1,2-diones (S-Alkyl and S-Aryl Thiosemisquarates) The reaction of semisquaric chloride (1) with thiols 2 (X = H) has been investigated. In the presence of triethylamine (Method A) only moderate yields of S-alkyl thiosemisquarates 3a-d were obtained. Moderate to good yields of S-alkyl and S-aryl thiosemisquarates 3a-f were obtained in the presence of aluminum chloride (Method B) and by the reaction of 1 with trimethylsilyl sulfides 2 (X=SiMe3) in the presence of aluminum chloride (Method C).
Pd-Catalyzed, Cu(I)-Mediated Cross-Couplings of Bisarylthiocyclobutenediones with Boronic Acids and Organostannanes
作者:Angélica Aguilar-Aguilar、Lanny S. Liebeskind、Eduardo Peña-Cabrera
DOI:10.1021/jo701331m
日期:2007.10.1
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).