A facile and convenient synthesis of functionalized ortho-nitrophenylboronic acids
摘要:
A variety of ortho-nitrophenylboronic acids bearing functional groups such as cyano, nitro, halo, alpha-bromomethyl, and ester were prepared in good yields via I-Mg exchange followed by quenching with trimethyl borate. All reagents employed in this procedure are commercially available and were used without further purification, and the procedure can be executed in about an hour. (c) 2005 Elsevier Ltd. All rights reserved.
A facile and convenient synthesis of functionalized ortho-nitrophenylboronic acids
摘要:
A variety of ortho-nitrophenylboronic acids bearing functional groups such as cyano, nitro, halo, alpha-bromomethyl, and ester were prepared in good yields via I-Mg exchange followed by quenching with trimethyl borate. All reagents employed in this procedure are commercially available and were used without further purification, and the procedure can be executed in about an hour. (c) 2005 Elsevier Ltd. All rights reserved.
Atmospheric oxygen was used for the first time as an oxidant in metal-catalyzed homocoupling of Grignard reagents. These manganese- or iron-catalyzed reactions are efficient, cheap, and eco-friendly. They are applicable to the large-scale synthesis of symmetrical conjugated compounds.