已经报道了在单一手性钌配合物或由非手性金配合物和手性钌配合物组成的二元体系的催化下有效的顺序分子内加氢/不对称氢化反应。从苯胺衍生物获得了多种对映体富集的苯并稠合的N-杂环,包括1,2,3,4-四氢喹啉,二氢吲哚和2,3,4,5-四氢-1 H-苯并[ b ] pine庚因衍生物-炔烃在温和条件下具有高产率(高达98%)和中等至优异的对映选择性(高达98%ee)。该协议具有良好的官能团耐受性和较高的原子经济性。此外,该催化方案适用于天然存在的生物碱(-)-Angustureine的克规模合成。
Chiral phosphoric acid catalyzed oxidative kinetic resolution of cyclic secondary amine derivatives including tetrahydroquinolines by hydrogen transfer to imines
The title reaction of tetrahydroquinolines with ketimine in the presence of chiral phosphoric acid proceeded with efficient conversion and excellent enantioselectivities.
Spiro‐Bicyclic Bisborane Catalysts for Metal‐Free Chemoselective and Enantioselective Hydrogenation of Quinolines
作者:Xiang Li、Jun‐Jie Tian、Ning Liu、Xian‐Shuang Tu、Ning‐Ning Zeng、Xiao‐Chen Wang
DOI:10.1002/anie.201900907
日期:2019.3.26
A new series of spiro‐bicyclic bisborane catalysts has been prepared by means of hydroboration reactions of C2‐symmetric spiro‐bicyclic dienes with HB(C6F5)2 and HB(p‐C6F4H)2. When used for hydrogenation of quinolines, these catalysts give excellent yields and enantiomeric excesses, and show turnover numbers of up to 460. The most attractive feature of these metal‐free hydrogenation reactions was the
通过C 2对称螺双环二烯与HB(C 6 F 5)2和HB(p C 6 F 4 H)2的硼氢化反应制备了一系列新的螺双环双硼烷催化剂。当用于喹啉加氢时,这些催化剂具有出色的收率和对映体过量,并且显示出高达460的周转率。这些无金属加氢反应的最吸引人的特点是宽泛的官能团耐受性,使该方法可与现有方法互补喹啉加氢的方法。
Highly efficient and enantioselective hydrogenation of quinolines and pyridines with Ir-Difluorphos catalyst
作者:Weijun Tang、Yawei Sun、Lijin Xu、Tianli Wang、Qinghua Fan、Kim-Hung Lam、Albert S. C. Chan
DOI:10.1039/c002668a
日期:——
resulted in a highly efficient catalyst system for asymmetrichydrogenation of quinolines at quite low catalyst loadings (0.05–0.002 mol%), affording the corresponding products with high enantioselectivities (up to 96%), excellent catalytic activities (TOF up to 3510 h−1) and productivities (TON up to 43000). The same catalyst was also successfully applied to the asymmetrichydrogenation of trisubstituted
Manganese‐Catalyzed Asymmetric Hydrogenation of Quinolines Enabled by π–π Interaction**
作者:Chenguang Liu、Mingyang Wang、Shihan Liu、Yujie Wang、Yong Peng、Yu Lan、Qiang Liu
DOI:10.1002/anie.202013540
日期:2021.3
The non‐noble metal‐catalyzed asymmetric hydrogenation of N‐heteroaromatics, quinolines, is reported. A new chiral pincer manganese catalyst showed outstanding catalytic activity in the asymmetric hydrogenation of quinolines, affording high yields and enantioselectivities (up to 97 % ee). A turnover number of 3840 was reached at a low catalyst loading (S/C=4000), which is competitive with the activity
报道了非贵金属催化的N-杂芳族化合物喹啉的不对称氢化。一种新型手性钳式锰催化剂在喹啉的不对称氢化中表现出出色的催化活性,提供了高收率和对映选择性(高达97%ee)。在低催化剂负载量(S / C = 4000)下,达到了3840的周转率,与该反应中最有效的贵金属催化剂的活性相竞争。对映选择性的精确调节通过π-π相互作用来保证。
Enantioselective Synthesis of Tetrahydroquinolines by Borrowing Hydrogen Methodology: Cooperative Catalysis by an Achiral Iridacycle and a Chiral Phosphoric Acid
作者:Ching Si Lim、Thanh Truong Quach、Yu Zhao
DOI:10.1002/anie.201703704
日期:2017.6.12
We report herein the highly enantioselective synthesis of 2‐substituted tetrahydroquinolines through borrowing hydrogen, a process recognized for its environmentally benign and atom‐economical nature. The use of an achiral iridacycle complex in combination with a chiralphosphoricacid as catalysts was the key to the development of this highly efficient and enantioselective transformation.