193812-91-8Relevant academic research and scientific papers
Novel bis(azole) pincer palladium complexes: Synthesis, structures and applications in Mizoroki-Heck reactions
Luo, Qun-Li,Tan, Jian-Ping,Li, Zhi-Fu,Qin, Yue,Ma, Lin,Xiao, Dong-Rong
supporting information; scheme or table, p. 3601 - 3609 (2011/07/30)
Two novel NCN-pincer complex precursors bearing frameworks of 2,6-bis(oxazol-4-yl)benzene (A) and 2-(thiazol-4-yl)-6-(oxazol-4-yl)benzene (B) were synthesized. Palladations of A and B afforded two new bis(azole) pincer complexes, [(A-κ3NCN)PdBr] (1) and [(B-κ3NCN) PdBr] (2). Both complexes were fully characterized by NMR, MS, DSC-TGA and single-crystal X-ray diffraction analysis. Complex 1 crystallizes in a noncentrosymmetric orthorhombic space group Cmc21 (No. 36, Z = 4). Complex 2 crystallizes in a centrosymmetric monoclinic space group P2 1/n (No. 14, Z = 4). Despite the similarity in their chemical formulas, the structures of the two complexes are subtly different: they are built up of two-dimensional supramolecular layers with identical topology, but stacked in different sequences, i.e., the layers in complex 1 are stacked in an AAAA-type fashion, while those in complex 2 are stacked in an alternating AA-1AA-1 sequence (A denotes a layer; A-1 stands for A's inversion symmetry equivalent). In addition, the complexes showed good catalytic activity toward Mizoroki-Heck reactions. The Royal Society of Chemistry 2011.
2,6-bis[(2S)-tetrahydrofuran-2-yl]phenyl diselenide: An effective reagent for asymmetric electrophilic addition reactions to olefins
Deziel, Robert,Malenfant, Eric,Thibault, Carl,Frechette, Sylvie,Gravel, Michel
, p. 4753 - 4756 (2007/10/03)
The enantioselective synthesis of a new and extremely effective organoselenium reagent (2) is reported. This chiral reagent was found to react with alkenes with a very high degree of facial selectivity in selenomethoxylation and ring closure reactions. In some cases the diastereoselectivities were found to be as high as 98%.
