Diastereoselective synthesis of (+)-α-skytanthine was established by means of an intramolecular Pauson–Khand reaction of N-but-2-yn-1-yl-N-[(2R)-2-methylbut-3-en-1-yl]-1-(2-nitrobenzene)sulfonamide, in which the newly generated stereogenic center was stereoselectively constructed to be R by reflection of the stereochemistry of the methyl group in the starting material.
通过N -but-2-yn-1-yl- N -[(2 R)-2-甲基but-3-en- 1-基] -1-(2-
硝基苯)磺酰胺,其中新生成的立体异构中心通过反映起始原料中甲基的立体
化学而被立体选择性地构建为R。