Synthesis of Five-, Six-, and Seven-Membered Ring Lactams by Cp*Rh Complex-Catalyzed Oxidative N-Heterocyclization of Amino Alcohols
作者:Ken-ichi Fujita、Yoshinori Takahashi、Maki Owaki、Kazunari Yamamoto、Ryohei Yamaguchi
DOI:10.1021/ol0489954
日期:2004.8.1
pentamethylcyclopentadienyl) for the lactamization of amino alcohols has been developed. As an example, the reaction of 3-(2-aminophenyl)-1-propanol in the presence of [CpRhCl(2)](2) (5.0% Rh) and K(2)CO(3) (10%) in acetone gives 3,4-dihydro-2(1H)-quinolinone in an isolated yield of 80%. A variety of five-, six-, and seven-membered benzo-fused lactams are synthesized by this catalytic system. [reaction:
开发了一种新的有效催化体系,由[CpRhCl(2)](2)/ K(2)CO(3)(Cp =五甲基环戊二烯基)进行氨基醇内酰胺化。例如,在[CpRhCl(2)](2)(5.0%Rh)和K(2)CO(3)(10%)的存在下,3-(2-氨基苯基)-1-丙醇的反应丙酮得到3,4-二氢-2(1H)-喹啉酮,分离产率为80%。通过该催化体系合成了五元,六元和七元的苯并稠合内酰胺。[反应:看文字]