A Highly Regio- and Chemoselective Ring Opening of Epoxides with Trimethylsilyl Azide/Aluminum Isopropoxide
作者:M. Emziane、P. Lhoste、D. Sinou
DOI:10.1055/s-1988-27631
日期:——
Functionalized epoxides are regioselectively opened using trimethylsilyl azide/aluminum isopropoxide giving 2-trimethylsiloxy azides by attack on the less substituted carbon.
Epoxides can be opened under neutral conditions with TMSN3 and TMSCN in the presence of catalytic amounts of Lewis acid, affording the corresponding ring-opened compounds in high yields.
Highly regio and chemoselective ring opening of epoxides with trimethylsilyl azide in the presence of aluminium isopropoxide and titanium isopropoxide
作者:Kun I. Sutowardoyo、Mohamed Emziane、Paul Lhoste、Denis Sinou
DOI:10.1016/s0040-4020(01)86420-6
日期:1991.1
The ring-opening of functionalized epoxides with trimethylsilyl azide in the presence of a catalytic amount of Ti(O-i-Pr)4 or Al(O-i-Pr)3 is described. The reaction is stereospecific and highly regiospecific, leading generally to the formation of the carbon-azido bond on the less substituted carbon. The mechanism of this reaction is also discussed.
Ouverture régiosélective d'époxydes par Me3SiN3 catalysée par Ti[O.iPr]4