Rapid atropisomerization of 1,1′:5′,1″-ternaphthalene-2,2′,6′,2″-tetrol (TERNOL) and its inhibition by tethering at positions 7 and 7″
摘要:
Atropisomerization of 1,1':5',1"-temaphthalene-2,2',6',2"-tetrol (TERNOL) is very fast under basic conditions. The stereochemical instability is attributed to the nature of oxide anion of the central 2,6-naphthodiol moiety. Ring-closing metathesis of 7,7"-diallyloxy TERNOL results in intramolecular tethering in a high yield, which intrinsically inhibits the rapid isomerization. Bidentate sites in the tethered TERNOL are proved to have enough structural flexibility as an axial chiral ligand. (c) 2006 Elsevier Ltd, All rights reserved.
DFT-Guided Phosphoric-Acid-Catalyzed Atroposelective Arene Functionalization of Nitrosonaphthalene
作者:Wei-Yi Ding、Peiyuan Yu、Qian-Jin An、Katherine L. Bay、Shao-Hua Xiang、Shaoyu Li、Ying Chen、K.N. Houk、Bin Tan
DOI:10.1016/j.chempr.2020.06.001
日期:2020.8
naphthalene via chiral phosphoric acid catalysis. This strategy enables efficient construction of atropisomeric indole-naphthalenes and indole-anilines with excellent stereocontrol. Density functional theory (DFT) calculations provide further insights into the origins of enantioselectivity and the reaction mechanisms. The successful application in the synthesis of NOBINs (2-amino-2′-hydroxy-1,1′-binaphthyl)
Enantioselective Oxidative Homocoupling and Cross-Coupling of 2-Naphthols Catalyzed by Chiral Iron Phosphate Complexes
作者:Sachin Narute、Regev Parnes、F. Dean Toste、Doron Pappo
DOI:10.1021/jacs.6b11198
日期:2016.12.21
Novel chiral ironphosphatecomplexes were prepared as catalysts for asymmetric oxidative coupling reactions. These catalysts were applied for the synthesis of enantio-enriched C1- and C2-symmetric BINOLs, in which the 3 and 3' positions are available for chemical modifications. It was proposed that the reaction takes place via an oxidative radical-anion coupling mechanism. A destructive BINOL racemization
The present disclosure provides, inter alia, compounds with MASP-2 inhibitory activity, compositions of such compounds, and methods of making and using such compounds.
本公开提供了具有MASP-2抑制活性的化合物,这些化合物的组合物,以及制备和使用这些化合物的方法。
Synthesis of Naphthalenediols by Aerobic Oxidation of Diisopropylnaphthalenes Catalyzed byN-Hydroxyphthalimide (NHPI)/α,α′-Azobisisobutyronitrile (AIBN)
作者:Yasuhiro Aoki、Satoshi Sakaguchi、Yasutaka Ishii
DOI:10.1002/adsc.200303168
日期:2004.2
Naphthalenediols were successfully synthesized in a one-pot reaction through the oxidation of diisopropylnaphthalenes with air catalyzed by N-hydroxyphthalimide (NHPI) combined with α,α′-azobisisobutyronitrile (AIBN) followed by decomposition with sulfuric acid. Thus, the oxidation of 2,6-diisopropylnaphthalene with air (20 atm) in the presence of AIBN (3 mol %) and NHPI (10 mol %) in CH3CN at 75 °C
一锅反应成功地合成了萘二醇,方法是将N-羟基邻苯二甲酰亚胺(NHPI)与α,α'-偶氮二异丁腈(AIBN)结合催化空气氧化二异丙基萘,然后用硫酸分解。因此,在A3N(3 mol%)和NHPI(10 mol%)存在下于75°C的CH 3 CN中用空气(20 atm)氧化2,6-二异丙基萘21小时,然后用0.3 MH处理2 SO 4以92%的收率得到2,6-萘二醇。
Asymmetric synthesis of binaphthyls through photocatalytic cross-coupling and organocatalytic kinetic resolution
作者:Heng-Hui Li、Jia-Yan Zhang、Shaoyu Li、Yong-Bin Wang、Jun Kee Cheng、Shao-Hua Xiang、Bin Tan
DOI:10.1007/s11426-022-1246-8
日期:2022.6
capitalizing on the capability of photoredox catalysis to generate reactive radical intermediate under mild conditions, we established a photocatalytic cross-coupling protocol that could deliver both derivatives from 1-bromo-2-naphthols in combination with 2-naphthols or 2-naphthylamines. This distinct activation mode could overcome structural or electronic limitation associated with conventional coupling