3S)-3-hydroxypipecolic acid and (2R,3S)-2-hydroxymethylpiperidin-3-ol were achieved from p-anisaldehyde via the regioselective and diastereoselective introduction of an N-protected amine group using chlorosulfonyl isocyanate, ring-closing methathesis, and oxidation of p-methoxyphenyl group as the key steps.
有效的立体选择性合成(2 S,3 S)-3-羟基
哌酸和(2 R,3 S)-2-羟基甲基
哌啶-3-醇是由
对茴香醛通过区域选择性和非对映选择性引入N-保护的胺基使用
氯磺酰基
异氰酸酯,闭环分解法和对
甲氧基苯基的氧化为关键步骤。