Multifunctional Palladium Catalysis. 2. Tandem Haloallylation Followed by Wacker−Tsuji Oxidation or Sonogashira Cross-Coupling
摘要:
graphicMultifunctional palladium catalysis is utilized in the one-pot stereocontrolled synthesis of tetrasubstituted methyl ketones and enynes. The homogeneous palladium dihalide catalyst utilized for the bromo-/chloroallylation of alkynes is reused in situ for subsequent Wacker-Tsuji oxidation or Sonogashira cross-coupling.
A two step procedure as improved alternative to the cyclocarbonylation of allyl halides and acetylene derivatives mediated by Ni(CO)4
作者:F. Camps、J. Coll、A. Llebaria、J.M. Moretó
DOI:10.1016/s0040-4039(00)82199-1
日期:1988.1
by Pd(II) complexes, such as bis-acetonitrile palladium(II) bromide, followed by cyclocarbonylation of the resulting adducts with Ni(CO)4 in CH3CN containing precise amounts of CH3OH and Et3N is a better procedure than the direct cyclocarbonylation of these substrates mediated by Ni(CO)4 for preparation of cyclopentenones, specially for monosubstituted acetylenes or weakly polarized disubstituted acetylenes
Ni-promoted Cyclopentenone Formation by Intramolecular Cyclocarbonylation of 1-Bromo-1,4-dienes
作者:Amadeu Llebaria、Francisco Camps、Josep Ma Moretó
DOI:10.1016/s0040-4020(01)85818-x
日期:1993.2
the formation of 1-bromo-1,4-dienes which were further converted to cyclopentenones through a Ni(CO)4 promoted carbonylation-cyclization process. Four CC bonds are formed by this two step sequence, leading to 2,3-substituted 5-methoxycarbonylmethylcyclopentenones 1. Application of this procedure to 2-butyne affords cyclopentenone 1c, an immediate precursor of the antibiotic methylenomicyn B.
CAMPS, F.;COLL, J.;LLEBARIA, A.;MORETO, J. M., TETRAHEDRON LETT., 29,(1988) N 45, C. 5811-5814
作者:CAMPS, F.、COLL, J.、LLEBARIA, A.、MORETO, J. M.
DOI:——
日期:——
Multifunctional Palladium Catalysis. 2. Tandem Haloallylation Followed by Wacker−Tsuji Oxidation or Sonogashira Cross-Coupling
作者:Avinash N. Thadani、Viresh H. Rawal
DOI:10.1021/ol0269603
日期:2002.11.1
graphicMultifunctional palladium catalysis is utilized in the one-pot stereocontrolled synthesis of tetrasubstituted methyl ketones and enynes. The homogeneous palladium dihalide catalyst utilized for the bromo-/chloroallylation of alkynes is reused in situ for subsequent Wacker-Tsuji oxidation or Sonogashira cross-coupling.