170938-18-8Relevant articles and documents
Cobalt-Catalyzed Allylic Alkylation Enabled by Organophotoredox Catalysis
Takizawa, Koji,Sekino, Tomoyuki,Sato, Shunta,Yoshino, Tatsuhiko,Kojima, Masahiro,Matsunaga, Shigeki
, p. 9199 - 9203 (2019/06/04)
Co-catalyzed allylic substitution reactions have received little attention, arguably because of the lack of any known advantage of Co catalysis over either Rh or Ir catalysis. Described here is a general and regioselective Co-catalyzed allylic alkylation using an in situ catalyst activation by organophotoredox catalysis. This noble-metal-free catalytic system exhibits unprecedentedly high reactivities and regioselectivities for the allylation with an allyl sulfone, for the first time, representing the unique synthetic utility of the Co-catalyzed method compared to the related Rh- and Ir-catalyzed reactions.
Regio- and enantioselective synthesis of chiral pyrimidine acyclic nucleosides via rhodium-catalyzed asymmetric allylation of pyrimidines
Liang, Lei,Xie, Ming-Sheng,Qin, Tao,Zhu, Man,Qu, Gui-Rong,Guo, Ha-Ming
, p. 5212 - 5215 (2017/11/06)
A direct route to branched N-allylpyrimidine analogues is herein reported via the highly regio- and enantioselective asymmetric allylation of pyrimidines with racemic allylic carbonates. With [Rh(COD)Cl]2/chiral diphosphine as the catalyst, a r
Regiocontrol and Stereoselectivity in Tungsten-Bipyridine Catalysed Allylic Alkylation
Lehmann, Juerg,Lloyd-Jones, Guy C.
, p. 8863 - 8874 (2007/10/03)
Tungsten-bipyridine complexes, generated in situ, catalyse the allylic alkylation of isocinnamyl methyl carbonate by dimethyl sodiomalonate with complete syn-stereoselectivity.When para substituted aryl-allyl methyl carbonates are employed, the regioselectivity correlates with Swain-Lupton parameters.Cross-over experiments demonstrate that the reactions do not proceed via the conventional 0> -> II allyl>+ -> 0 allyl-Nu> catalytic cycle.