Rhodium-Catalyzed One-Pot Intermolecular [2 + 2 + 2] Trimerization/Asymmetric Intramolecular [4 + 2] Cycloaddition of Two Aryl Ethynyl Ethers and 5-Alkynals
作者:Yuta Miyauchi、Keiichi Noguchi、Ken Tanaka
DOI:10.1021/ol3027158
日期:2012.12.7
It has been established that a cationic Rh(I)/(R)-H8-BINAP complex catalyzes the one-pot intermolecular [2 + 2 + 2] trimerization/asymmetricintramolecular [4 + 2] cycloaddition of two aryl ethynyl ethers and 5-alkynals to produce annulated 1,4-cyclohexadienes possessing two stereogenic centers.
Rhodium-Catalyzed Enantioselective Cyclizations of γ-Alkynylaldehydes with Acyl Phosphonates: Ligand- and Substituent-Controlled C–P or C–H Bond Cleavage
It has been established that a cationic rhodium(I)/(R)-H-8-BINAP or (R)-Segphos complex catalyzes two modes of enantioselective cyclizations of gamma-alkynylaldehydes with acyl phosphonates via C-P or C-H bond cleavage. The ligands of the Rh(I) complexes and the substitutents of both gamma-alkynylaldehydes and acyl phosphonates control these two different pathways.
Tanaka, Rie; Noguchi, Keiichi; Tanaka, Ken, Journal of the American Chemical Society, 2010, vol. 132, p. 1238 - 1239