Catalytic Cyclopropanation of Fluorine-Containing Alkenes and Dienes with Diazomethane and Methyl Diazoacetate
作者:Ekaterina V. Guseva、Nikolay V. Volchkov、Yury V. Tomilov、Oleg M. Nefedov
DOI:10.1002/ejoc.200400109
日期:2004.7
bonds in fluorine-containing unsaturated compounds toward cyclopropanation with diazomethane and methyl diazoacetate with catalysis by copper, rhodium and palladium compounds were studied. In general, the presence of fluorine atoms attached to the double bond or arranged at neighbouring positions exerted a suppressive effect on the cyclopropanation of this bond. As would be expected, diazomethane in the
研究了含氟不饱和化合物中各种双键在铜、铑、钯化合物催化下与重氮甲烷和重氮乙酸甲酯发生环丙烷化反应的反应性。通常,与双键相连或排列在相邻位置的氟原子的存在对该键的环丙烷化产生抑制作用。正如预期的那样,重氮甲烷在钯化合物的存在下主要是环丙烷化了较少高度取代的双键。在 2-氟-3-甲基丁二烯的情况下,反应发生在两个双键上。当使用重氮乙酸甲酯时,[Rh2(OAc)4] 是一种有效的催化剂,在烯烃和环烯烃中的单氟取代双键上产生环丙烷化产物。(© Wiley-VCH Verlag GmbH & Co. KGaA,