Efficient Access to Conjugated Dienones and Diene-diones from Propargylic Alcohols and Enolizable Ketones: A Tandem Isomerization/Condensation Process Catalyzed by the Sixteen-Electron Allyl-Ruthenium(II) Complex [Ru(η3-2-C3H4Me)(CO)(dppf)] [SbF6]
作者:Victorio Cadierno、Josefina Díez、Sergio E. García-Garrido、José Gimeno、Noel Nebra
DOI:10.1002/adsc.200606162
日期:2006.10
reacting terminal propargylicalcohols HCCCR1R2(OH) with enolizable ketones R3CH2C(O)R4 and β-dicarbonyl compounds R3C(O)CH2C(O)R4, respectively. The process, which is catalyzed by the 16e- (η3-allyl)-ruthenium(II) complex [Ru(η3-2-C3H4Me)(CO)(dppf)] [SbF6] associated with CF3CO2H, involves the initial isomerization of the propargylicalcohol into the corresponding α,β-unsaturated aldehyde R1R2CCHCHO
以高收率合成了多种共轭二烯酮R 1 R 2 CCHCHC(R 3)C(O)R 4和二烯二酮R 1 R 2 CCHCHC C(O)R 3 } C(O)R 4通过使末端炔丙醇HCCCR 1 R 2(OH)与可烯化的酮R 3 CH 2 C(O)R 4和β-二羰基化合物R 3 C(O)CH 2 C(O)R 4反应。的过程中,这是由催化16E -(η 3 -烯丙基) -钌(II)配合物的[Ru(η与CF 3 CO 2 H相关的3 -2-C 3 H 4 Me)(CO)(dppf)] [SbF 6 ]涉及将炔丙醇初始异构化为相应的α,β-不饱和醛R 1 R 2 CCHCHO(迈耶-舒斯特重排)和随后的醛醇缩合反应。