Direct Regiospecific and Highly Enantioselective Intermolecular α-Allylic Alkylation of Aldehydes by a Combination of Transition-Metal and Chiral Amine Catalysts
The first direct intermolecular regiospecific and highlyenantioselective α‐allylic alkylation of linear aldehydes by a combination of achiral bench‐stable Pd0 complexes and simple chiralamines as co‐catalysts is disclosed. The co‐catalytic asymmetric chemoselective and regiospecific α‐allylic alkylation reaction is linked in tandem with in situ reduction to give the corresponding 2‐alkyl alcohols
首次公开了通过非手性稳固的Pd 0配合物和简单的手性胺作为助催化剂的组合,线性醛类的第一个直接的分子间区域特异性和高对映选择性的α-烯丙基烷基化反应。将共催化的不对称化学选择性和区域特异性α-烯丙基烷基化反应与原位还原串联在一起,得到相应的2-烷基醇,其对映体比率很高(er高达98:2; er =对映体比率)。它也是有价值的2-烷基取代的半缩醛,2-烷基-丁烷-1,4-二醇和胺的快速入口。公开了具有生物活性的天然产物(例如,Arundic酸)的简明共催化不对称全合成。
Synthesis and <i>C</i>-Alkylation of Hindered Aldehyde Enamines
作者:David M. Hodgson、Christopher D. Bray、Nicholas D. Kindon、Nigel J. Reynolds、Steven J. Coote、Joann M. Um、K. N. Houk
DOI:10.1021/jo802016t
日期:2009.2.6
hindered lithium amides with terminal epoxides is described whereby aldehydeenamines are produced via a previously unrecognized reaction pathway. Some of these aldehydeenamines display unprecedented C-alkylation reactivity toward unactivated primary and secondary alkyl halides. For comparison, the reactivity of aldehydeenamines synthesized via a traditional condensation method was examined. C- rather
[DE] NEUE ALKIN-VERBINDUNGEN MIT MCH-ANTAGONISTISCHER WIRKUNG UND DIESE VERBINDUNGEN ENTHALTENDE ARZNEIMITTEL<br/>[EN] NOVEL ALKYNE COMPOUNDS HAVING AN MCH ANTAGONISTIC EFFECT AND MEDICAMENTS CONTAINING THESE COMPOUNDS<br/>[FR] NOUVEAUX COMPOSES ALKINE A ACTIVITE ANTAGONISTE CONTRE MCH ET MEDICAMENTS CONTENANT CES COMPOSES
申请人:BOEHRINGER INGELHEIM PHARMA
公开号:WO2004039780A1
公开(公告)日:2004-05-13
Die vorliegende Erfindung betrifft Alkin-Verbindungen der allgemeinen Formel (I), in der die Gruppen und Reste A, B, W, X, Y, Z, R1 und R2 die in Anspruch 1 angegebenen Bedeutungen aufweisen. Ferner betrifft die Erfindung Arzneimittel enthaltend mindestens ein erfindungsgemäßes Alkin. Auf Grund der MCH-Rezeptor antagonistischen Aktivität eignen sich die erfindungsgemäßen Arzneimittel zur Behandlung von metabolischen Störungen und/oder Essstörungen, insbesondere von Obesitas, Bulimie, Anorexie, Hyperphagia und Diabetes.
Method for Producing Bicyclic Compound via Claisen Rearrangement
申请人:Daiichi Sankyo Company, Limited
公开号:US20140094623A1
公开(公告)日:2014-04-03
The problem to be solved by the present invention is to provide a method for producing a compound having excellent activity as an α
2
δ ligand. The solution thereto is a method for producing a compound represented by the general formula (VI) or a salt thereof using rearrangement reaction: [in the formula, R
1
: a hydrogen atom or a C1-C6 alkyl group]
It is intended to provide a bicyclic γ-amino acid derivative having excellent activity as an α
2
δ ligand. The present invention provides a compound represented by the general formula (I):
wherein R
1
, R
2
, R
2′
, R
4
, R
5
, R
6
, R
7
, R
8
, and R
8′
are a hydrogen atom or the like; and R
3
is a hydrogen atom, a halogen atom, a C1-C6 alkyl group, or the like.