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Sku 15-0066-250MG
STREM
| Technical Notes: 1. Biaryl bisphosphine ligand with narrow dihedral angle. The DTBM SEGPHOS® ligand, as the ruthenium complex, gives superior enantioselectivity and diastereoselectivity through dynamic kinetic resolution in the asymmetric hydrogenation of a-substituted-ß-ketoesters useful in the synthesis of carbapenum antibiotics. 2.With rhodium, preferential enantioselective hydrogenation of more reactive olefin of extended enone structure. 3.Rhodium catalyzed chemo-, regio, and entantioselective [2 + 2 + 2] cycloaddition of alkynes with isocyanates . 4.With copper, enantioselective cross Aldol-type reaction of acetonitrile. 5.With copper, enantioselective vinylsilane alkenylation of aldehydes. 6.Gold carbene mediated ste reoselective cyclopropanation of propargyl esters. 7.With copper, enantioselective 1 ,2-reduction of ketones, and 1 ,4-reduction of a a, ß-usaturatedesters 8.With copper, catalytic enantioselective Mannich-type reaction. 9.Enantioselective fluorination of b ß-keto esters, tert butoxycarbonyl lactones and lactmes with Sodeoka's Pd-aqua complex and a fluorinating reagent. 10.Rh-catalyzed intramolecular olefin or carbonyI hydroacylation. 11.Pd-catalyzed y-arylation of ß,y-unsaturated ketones . 12.Involved in numerous conjugate alkynylation, and ring-opening alkynylation of azabenzonorbornadienes. 13.Involved in asymmetric hydroamination of bicyclic alkenes/dienes,13a diamination of conjugated dienes, 13b and hydroalkoxylation/hydrosulfenylation of allenes. 14.Used in cycloaddition reactions such as 1,3- dipolar cycloaddition of azomethine ylides, and Au-catalyzed [2+2] cycoaddition of allenes.14b 15.Asymmetric conjugate addition of nitroalkanes to a,ß-usaturated thioamides . 16.Asymmetric synthesis of isothiazoles through Cu catalyzed conjugate addition of allyl cyanide to a,ß-usaturated thioamides. 17.Asymmetric Ag-catalyzed cycloadditions. 18.Rhodium-catalyzed c C bond cleavage to generate acyclic, asymmetric quaternary centers . 19Iridium-catalyzed intermolecular hydroamidation of olefins. 20.Palladium-Catalyzed Asymmetric Hydrogenation of a-Acyloxy-1 -arylethanones. |
