Electrogenerated Chiral 4-Methoxy-2-oxazolidinones as Diastereoselective Amidoalkylation Reagents for the Synthesis of β-Amino Alcohol Precursors
作者:Kerstin Schierle-Arndt、Doris Kolter、Karsten Danielmeier、Eberhard Steckhan
DOI:10.1002/1099-0690(200107)2001:13<2425::aid-ejoc2425>3.0.co;2-2
日期:2001.7
3-oxazolidin-2-one (3) were used; these are readily available from the chiral pool with the aid of electrochemical transformations. Substitution of the 4-methoxy group in building blocks 2 and 3 with a large variety of organometallic nucleophiles resulted in the trans-diastereoselective formation of enantiopure 4,5-disubstituted 2-oxazolidinones, with a high degree of flexibility in the substituent at the 4-position
描述了对映体纯 4,5-取代 2-恶唑烷酮的灵活有效合成 - 作为药理活性 2-恶唑烷酮、β-氨基醇、β-阻滞剂和氮杂糖衍生物的前体的重要靶分子。作为起始材料,手性 N-acyliminium 离子 (4RS,5S)-5-氯甲基-4-甲氧基-1,3-恶唑烷-2-one (2) 和 (4RS,5R)-4-甲氧基的对映体纯存储形式使用-5-甲基-1,3-恶唑烷-2-一(3);在电化学转化的帮助下,这些很容易从手性池中获得。用多种有机金属亲核试剂取代结构单元 2 和 3 中的 4-甲氧基导致对映体纯 4,5-二取代的 2-恶唑烷酮的反式非对映选择性形成,在 4 处的取代基具有高度的灵活性-位置。