654065-84-6Relevant articles and documents
Poly(fluoroalkyl acrylate)-Bound Ruthenium Carbene Complex: A Fluorous and Recyclable Catalyst for Ring-Closing Olefin Metathesis
Yao, Qingwei,Zhang, Yiliang
, p. 74 - 75 (2004)
The synthesis of a fluorous olefin metathesis catalyst derived from the Grubbs second-generation ruthenium carbene complex is described. The air stable fluorous polymer-bound ruthenium carbene complex 1 shows high reactivity in effecting the ring-closing
Synthesis of cyclic sulfones by ring-closing metathesis.
Yao, Qingwei
, p. 427 - 430 (2007/10/03)
A general and highly efficient synthesis of cyclic sulfones based on ring-closing metathesis has been developed. The synthetic utility of the resulting cyclic sulfones was demonstrated by their participation in stereoselective Diels-Alder reactions and transformation to cyclic dienes by the Ramberg-Baecklund reaction.
Diastereoselective synthesis of polysubstituted tetrahydropyrans and thiacyclohexanes via indium trichloride mediated cyclizations
Yang,Mague,Li
, p. 739 - 747 (2007/10/03)
Polysubstituted tetrahydropyrans and thiacyclohexanes were synthesized in high yields with excellent diastereoselectivities via indium trichloride mediated cyclizations between homoallyl alcohols and mercaptans with aldehydes. In the case of tetrahydropyran products, the stereochemistry of the product was found to be directly correlated with the geometry of the homoallyl alcohols; whereas the cross-cyclization of aldehydes with trans-homoallyl alcohols generated (up-down-up) 2,3,4-trisubstituted tetrahydropyran products exclusively, the reaction of aldehydes with cis-homoallyl alcohols provided mainly (up-up-up) 2,3,4-trisubstituted products. When a trisubstituted homoallyl alcohol was used, its cross-cyclization with aldehydes generated (up-down-up-down-up) pentasubstituted tetrahydropyran derivatives with simultaneous controlling of five stereogenic centers. On the other hand, a cyclization-decyclization equilibrium was observed in the formation of thiacyclohexanes. The reaction of both cis- and trans-homoallyl mercaptans with aldehydes provided the same major diastereomers.