Switchable Smiles Rearrangement for Enantioselective <i>O</i>-Aryl Amination
作者:Xihao Chang、Qinglin Zhang、Chang Guo
DOI:10.1021/acs.orglett.9b01848
日期:2019.6.21
atropisomeric anilines from abundant and readily available precursors is one of the most challenging but valuable processes in organic synthesis. The use of highly efficient Smiles rearrangement to accomplish switchable enantioselective amination reactions of O-arenes provides access to nonsymmetric 2′-amino[1,1′-binaphthalen]-2-ol (i.e., NOBIN-type) and [1,1′-binaphthalene]-2,2′-diamine (i.e., BINAM-type)
Binaphthyldiamine-Based Diazaphospholidinesas a New Class of Chiral Monodentate P-Ligands
作者:Manfred T. Reetz、Hiromasa Oka、Richard Goddard
DOI:10.1055/s-2003-41036
日期:——
A new family of chiral diazaphospholidines is readily accessible by phosphorylating commercially available (S)-1,1'-binaphthyl-2,2'-diamine. NMR spectroscopy, mass spectrometry and X-ray crystallographic analysis reveal their unique structures. In preliminary studies these novel monodentate P-ligands were tested in Rh-catalyzed hydrogenation and hydroformylation (31% ee) reactions. The modular nature
通过磷酸化市售的 (S)-1,1'-binaphthyl-2,2'-二胺,可以很容易地获得一个新的手性二氮杂磷脂家族。核磁共振光谱、质谱和 X 射线晶体学分析揭示了它们独特的结构。在初步研究中,这些新型单齿 P-配体在 Rh 催化的氢化和加氢甲酰化 (31% ee) 反应中进行了测试。配体的模块化特性允许进一步的结构多样性。
Copper(II)-Mediated Oxidative Coupling of 2-Aminonaphthalene Homologues. Competition between the Straight Dimerization and the Formation of Carbazoles
作者:Štěpán Vyskočil、Martin Smrčina、Miroslav Lorenc、Iva Tišlerová、Robin D. Brooks、Janusz J. Kulagowski、Vratislav Langer、Louis J. Farrugia、Pavel Kočovský
DOI:10.1021/jo005691w
日期:2001.2.1
Whereas the Cu(II)-mediated oxidative coupling of 2-aminonaphthalenes 7a and 7b results in the clean formation of 1,1'-binaphthyls 13a and 13b, respectively, their higher homologues and congeners 8-12 have been found to exhibit a different reaction pattern. Thus, 2-aminoanthracene (8) gave a approximately 1:1 mixture of the expected bianthryl derivative 15 and the carbazole 16, whereas the 9-aminophenanthrene
The catalyticenantioselectivecyanosilylation of aromatic ketones was developed by using chiral lithium salts of (R)-BINOL- or (S)-BINAM-derived phosphoric acid compounds. In the presence of 10 mol% of chiral conjugate lithium salts, the corresponding tertiary cyanohydrins were obtained in high yields with moderate to high enantioselectivities. This is the first efficient example of asymmetric catalysis