中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | BOC-pseudoephedrine | 152614-95-4 | C15H23NO3 | 265.353 |
—— | 2-(N-tert-butoxycarbonyl-N-methylamino)-1-phenyl-1-propanone | 389131-81-1 | C15H21NO3 | 263.337 |
(1S,2S)-2-甲氨基-1-苯基丙-1-醇 | pseudoephedrine | 90-82-4 | C10H15NO | 165.235 |
麻黄素 | (1S,2R)-(+)-ephedrine | 321-98-2 | C10H15NO | 165.235 |
Reduction of N-t-BOC-protected-N-alkyl α-aminoketones with LiEt3BH or Li(s-Bu)3BH furnishes protected syn-β-aminoalcohols with high selectivities. In contrast, removal of the BOC group followed by reduction of the aminoketone gives anti-β-aminoalcohols with variable selectivities. With aromatic ketones, selectivities are typically high while aliphatic ketones show mediocre to high selectivities depending on steric considerations.Key words: β-aminoalcohol, diastereoselective reduction.