A Practical and Efficient Total Synthesis of Potent Insulinotropic (2S,3R,4S)-4-Hydroxyisoleucine through a Chiral N-Protected γ-Keto-α-aminoester
作者:Sandra De Lamo Marin、Cédric Catala、Sreekantha Ratna Kumar、Alain Valleix、Alain Wagner、Charles Mioskowski
DOI:10.1002/ejoc.201000378
日期:2010.7
(2S,3R,4S)-4-Hydroxyisoleucine, which exhibits remarkable insulinotropic activity, is expected to be a potent drug to treat type II diabetes. We propose herein a four-step synthesis of the enantiopure natural product on the basis of successive Mannich condensation, catalytic epimerization, N-para-methoxyphenyl deprotection, and diastereoselective reduction. This compact economical and scalable sequence
(2S,3R,4S)-4-羟基异亮氨酸具有显着的促胰岛素活性,有望成为治疗 II 型糖尿病的有效药物。我们在此提出基于连续曼尼希缩合、催化差向异构化、N-对甲氧基苯基脱保护和非对映选择性还原的四步合成对映纯天然产物。这种紧凑经济且可扩展的序列能够完美地控制三个连续的手性中心。它不涉及任何色谱纯化,在我们优化的条件下以 >99% de、>99% ee 和 22% 的总收率获得所需化合物。