1-Mercaptoalkanoylindoline-2-carboxylic acids, e.g., those of the formula ##STR1## and functional derivatives thereof, are antihypertensive and cardioactive agents.
The first enantioselective aza-Henry reaction of non-activated cyclic iminoesters, derived from cyclic amino acids, has been developed. Good yields and enantioselectivities were observed for the reactionusing our original cinchonaalkaloid sulfonamide/zinc(II) catalyst. The transition state was proposed to explain the stereoselectivity based on experiments and DFT calculations.
已经开发了衍生自环状氨基酸的非活化环状亚氨基酯的第一个对映选择性氮杂-亨利反应。使用我们的原始金鸡纳生物碱磺酰胺/锌( II ) 催化剂的反应观察到良好的产率和对映选择性。基于实验和 DFT 计算,提出了过渡态来解释立体选择性。
Asymmetric Synthesis of Indolines by Catalytic Enantioselective Reduction of 3<i>H</i>-Indoles
作者:Magnus Rueping、Claus Brinkmann、Andrey P. Antonchick、Iuliana Atodiresei
DOI:10.1021/ol1019234
日期:2010.10.15
A highly enantioselective metal-free reduction of 3H-indoles has been developed. This Brønsted acid catalyzed transfer hydrogenation of indolederivatives with Hantzsch dihydropyridine as the hydrogen source constitutes an efficient method for the synthesis of various optically active indolines with high enantioselectivities.
Modellversuche zur Synthese von Anhydrogliotoxin-Analoga: Eine bequeme Synthese von Thiazoloindolon-Derivaten
作者:Harry C. J. Ottenheijim、Nico P. E. Vermeulen、Leon F. J. M. Breuer
DOI:10.1002/jlac.197419740208
日期:1974.3.19
mit Äthanthiol quantitativ unter Bildung von 19 reagiert. 3-Mercaptopropionsaure (21) reagiert mit 5 unter Bildung von 22. Die Umwandlungen von 6 in 19 und von 5 in 22 sind Modellreaktionen für die Synthese des seco-Anhydrogliotoxin-Analogons 20 bzw. des Desthiornethylenanhydrogliotoxin-Analogons 24. Erste Versuche dazu werden diskutiert.
将硫代乙醇酸(11,RH)或2-巯基丙酸(12,RH)添加到2-乙氧基羰基-3,3-己烯吲哚啉(5)中会分别产生六氢噻唑并[3,2-a]吲哚酮6和14。。如果使用其乙酯11,/(RC 2 H 5)代替酸11(RH),则该反应仅在痕量酸的存在下进行。-将化合物6转化为α,α-二氯亚磺酰氯18,其与乙硫醇定量反应形成19。3-巯基丙酸(21)与5反应形成22。6至19和5至22的转化分别是合成癸二脱水胶体毒素类似物20和亚甲基脱水胶体毒素类似物24的模型反应,对此进行了首次尝试。