Synthesis of Chiral Amino Alcohols Embodying the Bispidine Framework and Their Application as Ligands in Enantioselectively Catalyzed Additions to CO and CC Groups
course of enantioselective transformations, bispidine amino alcohols built up by these two routes were investigated as chiralligands in the enantioselectively catalyzed addition of diethylzinc to aldehydes and chalcone. In general, tridentate ligands containing one chiral amino alcohol fragment and a second amino substituent without a stereogenic center were more efficient than tetradentate ligands with
已经开发了两种普遍适用的合成包含双吡啶骨架的手性氨基醇的路线。在线性路线 A 中,双吡啶骨架是由手性伯胺通过中间体形成哌啶酮和双吡啶酮依次构建的。在收敛路线 B 中,首先形成非手性双吡啶,然后通过氮碱与手性亲电试剂的反应引入 N-取代基。为了确定双吡啶核心及其 N 取代基是否能影响对映选择性转化的空间过程,研究了通过这两种途径构建的双吡啶氨基醇作为手性配体在二乙基锌对醛和查耳酮的对映选择性催化加成中。一般来说,含有一个手性氨基醇片段和没有立体中心的第二个氨基取代基的三齿配体比具有两个氨基醇结构单元的四齿配体更有效。使用最好的配体,二乙基锌对芳香族和脂肪族醛的对映选择性加成以 83-98% ee 进行,二乙基锌向查耳酮的镍催化加成达到 85% ee。
Aziridino alcohols as catalysts for the enantioselective addition of diethylzinc to aldehydes
作者:David Tanner、Hanne T. Kornø、David Guijarro、Pher G. Andersson
DOI:10.1016/s0040-4020(98)00875-8
日期:1998.11
The chiral aziridino alcohols 1 – 3 have been prepared either from amino acids (1a from serine; 1b – 1i and 3 from threonine; 2a – 2e from allo-threonine) or via asymmetric synthesis (1j, 1k, 1l and 2f from methyl cinnamate). These easily available ligands act as catalysts for the enantioselective addition of diethylzinc to benzaldehyde, with up to 90% stereoselectivity. The absolute configuration
Catalytic enantioselective reaction. Part 9. 1,2-O-Isopropylidene-5-deoxy-5-N,N-dialkyl (or -N-monoalkyl)amino-α-<scp>D</scp>-xylofuranose derivatives as highly effective chiral catalysts for enantioselective addition of diethylzinc to aliphatic and aromatic aldehydes
作者:Byung Tae Cho、Namdu Kim
DOI:10.1039/p19960002901
日期:——
(or-N-monoalkyl)amino-α-D-xylofuranose derivatives have been prepared form D-xylose and their enantioselectivities as chiral catalysts for the addition of diethylzinc to aldehydes have been examined. Or the chiral catalysts examined, 5-deoxy-1,2-O-isopropylidene-5-morpholino-α-D-xylofuranose provides high enantioselectivity for aromatic and relatively hindered aliphaticaldehydes, and 5-deoxy-5-hexaydroazepinyl-1
一系列新的1,2- ö异亚丙基-5-脱氧-5- Ñ,Ñ二烷基(或- Ñ -monoalkyl)氨基α- d -xylofuranose衍生物已被制备的形式d木糖以及它们的对映选择性手性已经研究了用于将二乙基锌加成到醛中的催化剂。或所研究的手性催化剂5-脱氧-1,2- O-异亚丙基-5-吗啉代-α- D-木呋喃糖为芳香族和相对受阻的脂族醛和5-脱氧-5-六氮杂pin啶基-1,2提供了高对映选择性- ö异亚丙基α- d -xylofuranose为受阻的脂族醛高度有效的。
New β-amino alcohols derived from L-valine as chiral inductors for enantioselective reductions of, and nucleophilic additions to carbonyl compounds
作者:P. Delair、C. Einhorn、J. Einhorn、J.L. Luche
DOI:10.1016/0040-4020(94)00947-s
日期:1995.1
β-Amino alcohols derivedfrom L-valine were used as chiral ligands in oxazaborolidinereductions of ketones. Structural modifications, such as the introduction of alkyl groups on the carbinol carbon and the nitrogen atoms, were shown to influence unfavourably the enantioselectivity. In contrast, the addition of diethyl zinc to aldehydes occurs with enhanced e.e.'s using these modified inductors, which
Aryl Substituted Indoles and Their Use as Blockers of Sodium Channels
申请人:Kyle Donald J.
公开号:US20130296281A1
公开(公告)日:2013-11-07
The invention relates to aryl and heteroaryl substituted compounds of Formula (I), and pharmaceutically acceptable salts, prodrugs, or solvates thereof, wherein G, R
1
, and Z
1
-Z
5
are defined as set forth in the specification. The invention is also directed to the use of compounds of Formula (I) to treat a disorder responsive to the blockade of sodium channels. Compounds of the present invention are especially useful for treating pain.