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).
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).
Assessing Squarates as Amine-Reactive Probes
作者:Katherine I. Taylor、Jordan S. Ho、Hallie O. Trial、Alan W. Carter、Laura L. Kiessling
DOI:10.1021/jacs.2c05691
日期:2023.11.22
Probes that covalently label protein targets facilitate the identification of ligand-binding sites. Lysine residues are prevalent in the proteome, making them attractive substrates for covalent probes. However, identifying electrophiles that undergo amine-specific, regioselective reactions with bindingsite lysine residues is challenging. Squarates can engage in two sequential conjugate addition–elimination