Iodine-promoted sequential Michael and oxidative dehydrogenation processes: synthesis of trisubstituted methanes containing a coumarin and a chromone ring
摘要:
An iodine-promoted convenient and environmentally friendly sequential method for the synthesis of trisubstituted methanes bearing a coumarin and a chromone ring is described. The remarkable features of this approach include avoidance of metals, working under air, employment of readily available starting materials, good functional group tolerance and simple operation. (C) 2015 Elsevier Ltd. All rights reserved.