A C-H borylation approach to suzuki-miyaura coupling of typically unstable 2-heteroaryl and polyfluorophenyl boronates
A method for the synthesis of biaryls and heterobiaryls from arenes and haloarenes without the intermediacy of unstable boronic acids is described. Pinacol boronate esters that are analogous to unstable boronic acids are formed in high yield by iridium-catalyzed C-H borylation of heteroarenes and fluoroarenes. These boronates are stable in the solid state or in solution and can be generated and used in situ. They couple with aryl halides in the presence of simple palladium catalysts, providing a convenient route to biaryl and heteroaryl products that have been challenging to prepare via boronic acids.
Robbins, Daniel W.,Hartwig, John F.
supporting information; experimental part
p. 4266 - 4269
(2012/10/08)
2-SUBSTITUTED-6-AMINO-5-ALKYL, ALKENYL OR ALKYNYL-4-PYRIMIDINECARBOXYLIC ACIDS AND 6-SUBSTITUTED-4-AMINO-3- ALKYL, ALKENYL OR ALKYNYL PICOLINIC ACIDS AND THEIR USE AS HERBICIDES
6-Amino-4-pyrimidinecarboxylic acids having alkyl, alkenyl or alkynyl substituents in the 5-position and 4-aminopicolinic acids having alkyl, alkenyl or alkynyl substituents in the 3-position, and their amine and acid derivatives, are potent herbicides demonstrating a broad spectrum of weed control.
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Page/Page column 8
(2009/04/24)
2-(SUBSTITUTED PHENYL)-6-AMINO-5-ALKOXY, THIOALKOXY AND AMINOALKYL-4-PYRIMIDINECARBOXYLATES AND THEIR USE AS HERBICIDES
2-(Substituted phenyl)-6-amino-5-alkoxy, thioalkoxy and aminoalkyl-4-pyrimidinecarboxylic acid and its derivatives are potent herbicides demonstrating broad spectrum of weed control.
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Page/Page column 9
(2009/04/24)
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