644994-49-0Relevant academic research and scientific papers
Soluble polyisobutylene-supported reusable catalysts for olefin cyclopropanation
Bergbreiter, David E.,Tian, Jianhua
, p. 4499 - 4503 (2007)
Polyisobutylene oligomers (PIB) have been used as soluble supports for the immobilization of cyclopropanation catalysts. In addition to simple carboxylate ligands, chiral bisoxazolines have been successfully attached to these heptane-soluble polymers. The
Reusable nano-sized chiral bisoxazoline catalysts
Ono, Fumiyasu,Kanemasa, Shuji,Tanaka, Junji
, p. 7623 - 7626 (2007/10/03)
The nano-sized gold particle-based chiral catalyst having two kinds of alkyl thiol spacers, one of which is substituted with the chiral bisoxazoline/copper(II) complex at the end, behaves as reusable homogeneous catalyst. This gold particle complex acts as nearly homogeneous catalyst in the ene reaction between 2-phenylpropene and ethyl glyoxylate in dichloromethane, while it undergoes dense aggregation when diluted with hexane so as to be separated by simple filtration. Thus, the catalyst can be recovered after the completion of reaction by the repeated sequences of solvent exchange, centrifugal treatment, and decantation, followed by the recharge of substrates, and the situation is ready for the second reaction.
Chiral ditopic receptors. Application to palladium-catalyzed allylic alkylation
Bourguignon, Jean,Bremberg, Ulf,Dupas, Georges,Hallman, Kristina,Hagberg, Lars,Hortala, Laurent,Levacher, Vincent,Lutsenko, Serghey,Macedo, Emmanuel,Moberg, Christina,Quéguiner, Guy,Rahm, Fredrik
, p. 9583 - 9589 (2007/10/03)
Chiral pyridinooxazoline, quinolinooxazoline, bis(oxazolino)pyridine (pybox), and bisoxazoline (box) derivatives containing crown ether residues were prepared. Some of the ligands were assessed in substrate binding studies and in palladium catalyzed allylic alkylations.
