Cyclic oxonium ylides: building blocks for iterative synthesis of polycyclic ethers
作者:Fredrik P Marmsäter、John A Vanecko、F.G West
DOI:10.1016/s0040-4020(02)00051-0
日期:2002.3
diazoketones bearing remote benzyl or allyl ethers was subjected to a variety of conditions for catalytic diazodecomposition and cyclic oxonium ylide formation as a possible method for polycyclic ether synthesis. Allyl ethers 19, 25 and 29 underwent efficient conversion to the corresponding bis(pyran) and tris(pyran) products in the presence of Cu(tfacac)2, while benzyl ether 15 was converted to bicyclic products
作为带有多环醚合成的一种可能的方法,使一系列带有远端苄基或烯丙基醚的重氮酮经受各种条件的催化重氮分解和环状氧鎓叶立德的形成。烯丙基醚19,25和29后行有效转化成相应的二(吡喃)和铜(tfacac)存在下的三(吡喃)的产品2,而苄基醚15被转化为二环的产品16和34用的Rh 2(TPA )4。用Rh 2(tpa)4处理同源底物32提供了具有良好收率的新型中环环丙烷化产物35。