Iridium-Catalyzed Asymmetric Hydrogenation of Quinoline Derivatives with C3*-TunePhos
作者:Fa-Rong Gou、Wei Li、Xumu Zhang、Yong-Min Liang
DOI:10.1002/adsc.201000485
日期:2010.10.4
A series of C3*-TunePhos chiral diphosphine ligands has been successfully applied in the iridium-catalyzed enantioselective hydrogenation of quinolines, and this methodology provided an efficient access to a variety of optically active tetrahydroquinolines with up to 93% ee. Furthermore, attempts on the asymmetrichydrogenation of quinoline N-oxide are also discussed.
<i>P</i>-Chiral, <i>N</i>-phosphoryl sulfonamide Brønsted acids with an intramolecular hydrogen bond interaction that modulates organocatalysis
作者:Minglei Yuan、Ifenna I. Mbaezue、Zhi Zhou、Filip Topic、Youla S. Tsantrizos
DOI:10.1039/c9ob01774g
日期:——
Brønstedacids exemplified by OttoPhosa I (5c) were designed and evaluated in the asymmetric transferhydrogenation of quinolines. Their catalytic properties are modulated by an intramolecular hydrogen bond that rigidifies their catalytic cavity, accelerates the reaction rate and improves enantioselectivity.
Kinetic resolution of racemic 6-substituted 1,2,3,4-tetrahydroquinaldines with chiral acyl chlorides. Experiment and quantum chemical simulation
作者:E. N. Chulakov、M. A. Korolyova、L. Sh. Sadretdinova、A. A. Tumashov、M. I. Kodess、G. L. Levit、V. P. Krasnov
DOI:10.1007/s11172-021-3164-9
日期:2021.5
A comparative study of the kinetic resolution (KR) of racemic 6-substituted 2-methyl-1,2,3,4-tetrahydroquinolines with acyl chlorides of (S)-naproxen, N-phthaloyl-(S)-leucine, and (R)-O-phenyllactic acid was carried out. The selectivity factors in the KR of racemicamines with acyl chlorides of (S)-naproxen and (R)-O-phenyllactic acid were shown to be approximately the same and higher than those for
外消旋 6-取代 2-甲基-1,2,3,4-四氢喹啉与 ( S )-萘普生、N-邻苯二甲酰-( S )-亮氨酸和(R ) -O-苯基乳酸进行。外消旋胺与 ( S )-萘普生和 ( R ) -O - 苯基乳酸的酰氯的 KR 的选择性因子被证明与N-邻苯二甲酰-( S)-亮氨酰氯。使用DFT方法解释了三种不同手性酸的酰氯对含有不同电子性质基团的外消旋四氢喹哪啶的KR立体分化的原因。稳定试剂的芳族片段的π-π相互作用的条件,在过渡态中不会以相同的形式出现并导致次要的非对映异构产物,是在与(S)的更快酰化反应的过渡态中创建的-萘普生和( R ) -O-苯基乳酸酰氯。在 2-甲基-1,2,3,4-四氢喹啉和 2-甲基-6-甲氧基-1,2,3,4-四氢喹啉与N-邻苯二甲酰基-( S)-亮氨酰氯,酰化非对映选择性很可能由构象因素决定。使用外消旋体与 ( S )-萘普生酰氯的 KR 合成了具有高光学纯度的