专利号:WO-2005090356-A1 优先权日:2004-03-15 标 题 :1,3 DIHYDROFURO [3,4-c]PYRIDINES AND THEIR PREPARATION 发明人:BONRATH WERNER; HELLER BARBARA 权利人:DSM IP ASSETS BV; BONRATH WERNER; HELLER BARBARA 摘要:The present invention relates to novel 1,3-dihydrofuro[3,4-c]pyridines which are useful intermediates in the synthesis of pyridoxines and a method for their preparation by cobalt(I) complex-catalysed [2 + 2 + 2]-cycloaddition of di-[(3-dimethyl-C1-4-alkoxysilyl)Â2-propynyl)] ethers with acetonitrile.