Synthesis of 2-substituted 2H-chromenes using potassium vinyltrifluoroborates
摘要:
2H-Chromenes were synthesized from salicylaldehyde using potassium vinylic borates in the presence of secondary amines. We synthesized these 2H-chromene derivatives as a part of an ongoing project to develop inhibitors for TGF-beta receptors. Potassium vinyl trifluoroborates react with salicylaldehydes at 80 degrees C in the presence of a secondary amine and produced 2-substituted 2H-chromene derivatives with a 70-90% yield. (c) 2008 Elsevier Ltd. All rights reserved.