中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3aR,8bS)-2-[1-[(3aS,8bR)-4,8b-dihydro-3aH-indeno[1,2-d][1,3]oxazol-2-yl]-2-[(3aR,8bS)-4,8b-dihydro-3aH-indeno[1,2-d][1,3]oxazol-2-yl]propan-2-yl]-4,8b-dihydro-3aH-indeno[1,2-d][1,3]oxazole | 1239015-12-3 | C33H29N3O3 | 515.612 |
—— | (3aR,3a'R,3a''R,8aS,8a'S,8a''S)-2,2',2''-(propane-1,2,2-triyl)tris(3a,8a-dihydro-8H-indeno[1,2-d]oxazole) | 1278594-21-0 | C33H29N3O3 | 515.612 |
Enantioselective methylene insertion into prochiral cyclobutanones is described providing access to chiral β-substituted cyclopentanones as important structural motif in synthesis and natural products. Commercially available trimethylsilyl as well as other silyl diazomethanes act as one-carbon synthon and scandium triflate is found to be a potent Lewis acid catalyst. By using bis(oxazoline) ligands, enantioinduction is achieved for a number of β-substituted cyclopentanones including examples bearing all-carbon quaternary stereocentres.