Binaphthoxide
WebEspecially, the solid aluminum lithium bis(binaphthoxide) free of tetrahydrofuran was obtained by a new procedure using (S)-bi(2-naphthol), aluminum isopropoxide and n … WebApr 14, 1997 · Enantioselective synthesis of α-hydroxy phosphonates using the LaLi3tris (binaphthoxide) catalyst (LLB), prepared by an improved method H. Sasai, M. …
Binaphthoxide
Did you know?
WebJun 3, 2008 · An efficient catalytic enantioselective hetero-Diels–Alder reaction of Danishefsky's diene with aldehydes using the magnesium binaphthoxide system has been developed, affording a variety of 2-substituted 2,3-dihydro-4H-pyran-4-ones in high yields and with excellent ee values. The aggregation behavior and nonlinear effect of the … WebAug 27, 2004 · Mechanistic studies of a reaction promoted by the [YLi3[tris(binaphthoxide)]] complex: are three 1,1'-bi-2-naphthol units in a rare-earth-alkali-metal heterobimetallic complex necessary?
Web优惠券领取后72小时内有效，10万种最新考研考试考证类电子打印资料任你选。涵盖全国500余所院校考研专业课、200多种职业资格考试、1100多种经典教材，产品类型包含电子书、题库、全套资料以及视频，无论您是考研复习、考证刷题，还是考前冲刺等，不同类型的产品可满足您学习上的不同需求。 WebApr 2, 2014 · A 3,3′-bis (aminoimino)BINOL ligand was newly designed and synthesized for the formation of a trinuclear Zn complex upon reaction with Zn (OAc) 2. Using the …
WebDec 5, 2003 · A heterobimetallic YLi3tris(binaphthoxide) catalyst (YLB) promoted a 1,4-addition of O-methylhydroxylamine in high enantiomeric excess (up to 97% ee). Catalyst loading was reduced to as little as 0.5 mol %, still affording the 1,4-adduct in 96% yield and 96% ee. A high concentration of substrates and the scalability of the present system is … WebOct 12, 2015 · In their Communication, T. Arai et al. reported a Zn 3 (OAc) 4 -3,3’-bis (aminoimino)binaphthoxide (tri-Zn) catalyst for the asymmetric iodolactonization. Based on the structure of unimolecular tri-Zn catalyst, a poly-Zn complex was also prepared by the self-organization of 3,3’-diformyl binaphthol, tetramine, and Zn (OAc) 2.
WebApr 24, 2014 · A 3,3′-bis (aminoimino)BINOL ligand was newly designed and synthesized for the formation of a trinuclear Zn complex upon reaction with Zn (OAc) 2. Using the harmony of the tri-zinc atoms, 1 mol% Zn 3 (OAc) 4 -3,3′-bis (aminoimino)binaphthoxide catalyzed asymmetric iodolactonization in up to 99.9% ee.
Web1,1 ′-Bi-2-naphthol ( BINOL) is an organic compound that is often used as a ligand for transition-metal catalysed asymmetric synthesis. BINOL has axial chirality and the … list of boyfriends in like a fashionistaWebDec 31, 2003 · A heterobimetallic YLi3tris(binaphthoxide) catalyst (YLB) promoted a 1,4-addition of O-methylhydroxylamine in high enantiomeric excess (up to 97% ee). Catalyst loading was reduced to as little as 0.5 mol %, still affording the … images of snow skiingWebAug 25, 2004 · The power of three: Mechanistic studies based on the kinetic profiles of the catalytic asymmetric 1,4-addition of an amine to chalcone revealed that all three binol ligands of the [YLi 3 {tris(binaphthoxide)}] complex 1 are involved in the active species of the Y–Li heterobimetallic catalyst. images of snowshoe catshttp://school.freekaoyan.com/gd/zsu/daoshi/2024/05-19/16214197821471024.shtml list of boyes storesWebNew chiral ligands for asymmetric polymetallic catalysts were designed on the basis of the assumption that the higher-order assembly structure is stabilized by modifying the modular unit. The designed ligands 6 and 7 contained a scaffolding cyclohexane ring with a Lewis base phosphine oxide directly attached to the scaffold. A module in the polymetallic … images of snow storms funnyWebAug 7, 2014 · A 3,3'-bis(aminoimino)BINOL ligand was newly designed and synthesized for the formation of a trinuclear Zn complex upon reaction with Zn(OAc)2. Using the harmony of the tri-zinc atoms, 1 mol% Zn3(OAc)4-3,3'-bis(aminoimino)binaphthoxide catalyzed asymmetric iodolactonization in up to 99.9% ee. images of snow scenes at christmasWebOct 4, 2002 · An asymmetric cyanation reaction and sequential asymmetric cyanation-nitroaldol reaction using a [YLi(3)[tris(binaphthoxide)]] single catalyst component: catalyst tuning with achiral additives Angew Chem Int Ed Engl . images of snow plow trucks