Regioselective Palladium(0) Catalyzed Amination of Carbonates of Allylic α-Hydroxyphosphonates with Hydroxylamine Derivatives: A Convenient Route to Phosphonic Acids Related to the Antibiotic Fosmidomycin
作者:Elisabeth Öhler、Silvia Kanzler
DOI:10.1055/s-1995-3942
日期:1995.5
Palladium(0) catalyzed amination of diisopropyl (1-methoxycarbonyloxy-2-propenyl)phosphonate (1) with tert-butyl (tert-butoxycarbonyloxy)carbamate (BocNHOBoc, 2a), and (N-acetyloxy)acetamide (AcNHOAc, 2b) proceeds regiospecifically and with high (E)-stereoselectivity to give the protected [3-(N-hydroxyamino)-1-propenyl]phosphonates 3a and 3b, respectively, in high yields. Hydrogenation of compounds 3a and 3b affords the corresponding propylphosphonates 4. Compounds 3a,b and 4a,b are further converted to precursors and analogues of the phosphonic acid antibiotic fosmidomycin.
钯(0)催化了(1-甲氧基羰基氧基-2-丙烯基)膦酸二异丙酯(1)与(叔丁氧基羰基氧基)氨基甲酸叔丁酯(BocNHOBoc,2a)和(N-乙酰氧基)乙酰胺(AcNHOAc、2b)进行区域特异性和高(E)-立体选择性反应,分别得到高产率的受保护[3-(N-羟基氨基)-1-丙烯基]膦酸盐 3a 和 3b。将化合物 3a 和 3b 加氢,可得到相应的丙基膦酸盐 4。化合物 3a,b 和 4a,b 可进一步转化为膦酸抗生素磷霉素的前体和类似物。