通过两种方法合成了三种新颖的α-(九氟叔丁基氧基)羧酸酯:旋光性(S)-α-羟基羧酸酯的Mitsunobu反应和从相应的O-甲磺酰基衍生物开始的Williamson合成。来自(S)-乳酸乙酯的两种方法均形成氟光学活性(R)-乳酸酯衍生物,而来自(S)-扁桃酸甲酯的反应在消旋作用下进行。描述了这种消旋作用的建议机制。在Mitsunobu条件下,(S)-苯基乳酸甲酯的转化也具有立体特异性,但其O的反应-甲磺酰基衍生物产生取代和消除产物的混合物。通过上述酯的水解制备的α-(九氟叔丁氧基)羧酸的光学纯度通过1 H NMR光谱法测定。
[EN] ALKALOID AMINOESTER DERIVATIVES AND MEDICINAL COMPOSITION THEREOF<br/>[FR] DÉRIVÉS AMINOESTÉRIFIÉS D'ALCALOÏDES ET COMPOSITION MÉDICINALE LES INCLUANT
申请人:CHIESI FARMA SPA
公开号:WO2010072338A1
公开(公告)日:2010-07-01
The present invention relates to alkaloid aminoester derivatives acting as muscarinic receptor antagonists, to methods of preparing such derivatives, to compositions comprising them and therapeutic use thereof.
Chiral syntheses of methyl (<i>R</i>
)-2-Sulfanylcarboxylic esters and acids with optical purity determination using HPLC
作者:Ryosuke Sasaki、Yoo Tanabe
DOI:10.1002/chir.22860
日期:2018.6
Accessible chiral syntheses of 3 types of (R)‐2‐sulfanylcarboxylic esters and acids were performed: (R)‐2‐sulfanylpropanoic (thiolactic) ester (53%, 98%ee) and acid (39%, 96%ee), (R)‐2‐sulfanylsucciinic diester (59%, 96%ee), and (R)‐2‐mandelic ester (78%, 90%ee) and acid (59%, 96%ee). The present practical and robust method involves (i) clean SN2 displacement of methanesulfonates of (S)‐2‐hydroxyesters
ALKALOID AMINOESTER DERIVATIVES AND MEDICINAL COMPOSITION THEREOF
申请人:Caligiuri Antonio
公开号:US20100173880A1
公开(公告)日:2010-07-08
Alkaloid aminoester compounds which act as muscarinic receptor antagonists are useful for the prevention and/or treatment of a broncho-obstructive or inflammatory diseases.
具有肌碱受体拮抗作用的生物碱氨酯化合物对于预防和/或治疗支气管阻塞性或炎症性疾病是有用的。
Alkaloid aminoester derivatives and medicinal composition thereof
申请人:Caligiuri Antonio
公开号:US08455646B2
公开(公告)日:2013-06-04
Alkaloid aminoester compounds which act as muscarinic receptor antagonists are useful for the prevention and/or treatment of a broncho-obstructive or inflammatory diseases.
生物碱氨酯化合物可作为肌动蛋白受体拮抗剂,对预防和/或治疗支气管阻塞性或炎症性疾病有用。
Properties of .alpha.-keto cations. Facile generation under solvolytic conditions