The Journal of organic chemistry, 73(22), 9151-9154 (2008-10-16)
A new synthesis of 3,3'-bioxindoles is reported that is well suited for the preparation of unsymmetrical structures. In the key step, 3-hydroxy-3,3'-bioxindoles are constructed by Mukaiyama aldol reaction of 2-siloxyindoles with isatins. These tertiary carbinols are formed in high diastereoselectivities
Synthesis of 5-aryl- and 5-heteroaryl-7-carboxyl-8-hydroxyquinaldines through Suzuki cross-coupling reaction with potassium organotrifluoroborates
A general method based on nickel-catalyzed C-O activation of various phenol derivatives with potassium (hetero)aryltrifluoroborates has been developed. A large number of heterobiaryls can be easily obtained with yields up to 99% using methanesulfonate cross-coupling partners.
The Journal of organic chemistry, 74(3), 973-980 (2008-12-25)
A wide variety of bench-stable potassium heteroaryltrifluoroborates were prepared, and general reaction conditions were developed for their cross-coupling to aryl and heteroaryl halides. The cross-coupled products were obtained in good to excellent yields. This method represents an efficient and facile
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