Development of the First Menthane-Based Chiral Bis(π-allylpalladium) Catalysis: Asymmetric Allylation of Imines
作者:Rodney A. Fernandes、Dipali A. Chaudhari
DOI:10.1002/ejoc.201101588
日期:2012.4
A new ethylidene menthane-basedchiralπ-allylpalladium complex catalyzes the asymmetricallylation of various imines with allyltributylstannane and 1 equiv. of water to give chiral homoallylamines in good yields and enantioselectivities. The reaction was carried out essentially under neutral conditions and displayed a good transfer of chiral information from the menthane skeleton through the formation
The First Catalytic Asymmetric Allylation of Imines with the Tetraallylsilane−TBAF−MeOH System, Using the Chiral Bis-π-allylpalladium Complex
作者:Rodney A. Fernandes、Yoshinori Yamamoto
DOI:10.1021/jo035453b
日期:2004.2.1
The asymmetricallylation of imines with use of catalytic transition metals with chiral ligands should be a new frontier of the enantioselective C−C bond formation. So far allyltrimethylsilane, allyltrichlorosilane, and allyltrimethoxysilane have been commonly employed with use of either silane activators or dual silane−imine activators. However, tetraallylsilane is untouched in the allylation of aldimines
Chiral Bis-π-allylpalladium Complex Catalyzed Asymmetric Allylation of Imines: Enhancement of the Enantioselectivity and Chemical Yield in the Presence of Water
作者:Rodney A. Fernandes、Anton Stimac、Yoshinori Yamamoto
DOI:10.1021/ja037272x
日期:2003.11.1
The chiral pi-allylpalladium complex 2a, prepared from exoethylidenenorpinane 7, catalyzed the allylation of diverse imines with allyltributylstannane in the presence of 1 equiv of water in good to high enantioselectivities. The catalyst prepared from a 1:1 mixture of (E)- and (Z)-7 was found to be consisting of two stereoisomers 2a and 2b in 1.3:1 ratio. On separation, 2a catalyzed the allylation of
Menthane‐based η3‐bis‐π‐allylpalladium chloride dimer complexes with four chloride bridges were prepared for the first time. These complexes catalyze the asymmetricallylation of various imines with allyltributylstannane and one equivalent of water to give chiral homoallylamines in yields of 60–77 % and enantioselectivity up to er = 93:7.
Preparation and application of a polymer-supported chiral π-allylpalladium catalyst for the allylation of imines
作者:Ming Bao、Hiroyuki Nakamura、Yoshinori Yamamoto
DOI:10.1016/s0040-4039(99)02032-8
日期:2000.1
The polymer-supported chiral π-allylpalladium catalyst 8 was applied to the asymmetric allylation reaction of imines 9 with allyltributylstannane. The catalyst was very stable and could be reused several times with high catalytic activity, although the enantioselectivity was not necessarily high.