One-pot synthesis of hexahydro-4H-chromens via rhodium-catalysed tandem hydroformylation starting from 1,5-dienes
摘要:
A convenient one-pot preparation of substituted hexahydro-4H-chromens via rhodium catalysed tandem hydroformylation starting from 1,5-dienes is described. The multi-step procedure starts with a hydroformylation of one double bond followed by carbonyl ene reaction, a second hydroformylation and enol ether forming cyclisation. (C) 1999 Elsevier Science Ltd. All rights reserved.