Enantioselective Synthesis of Pyrrolidine-, Piperidine-, and Azepane-Type <i>N</i>-Heterocycles with α-Alkenyl Substitution: The CpRu-Catalyzed Dehydrative Intramolecular <i>N</i>-Allylation Approach
作者:Tomoaki Seki、Shinji Tanaka、Masato Kitamura
DOI:10.1021/ol203218d
日期:2012.1.20
acid derivatives [(R)- or (S)-Cl-Naph-PyCOOCH2CH═CH2] catalyzes asymmetric intramolecular dehydrative N-allylation of N-substituted ω-amino- and -aminocarbonyl allylic alcohols with a substrate/catalyst ratio of up to 2000 to give α-alkenyl pyrrolidine-, piperidine-, and azepane-type N-heterocycles with an enantiomer ratio of up to >99:1. The wide range of applicable N-substitutions, including Boc, Cbz
Cu-Catalyzed Asymmetric Conjugate Additions of Alkylzinc Reagents to Acyclic Aliphatic Enones
作者:Hirotake Mizutani、Sylvia J. Degrado、Amir H. Hoveyda
DOI:10.1021/ja0122849
日期:2002.2.1
Cu-catalyzed enantioselective conjugate additions to acyclic aliphatic enones are reported. The resulting enolates may be functionalized intra- and intermolecularly, leading to the formation of an additional C-C bond. The utility of the present method is not limited to reactions involving Et2Zn; a variety of alkylzincs may be used. Moreover, many of the requisite substrates can be easily accessed through
报道了铜催化的对映选择性共轭添加到无环脂肪族烯酮。所得的烯醇可以在分子内和分子间进行功能化,从而形成额外的 CC 键。本方法的用途不限于涉及 Et2Zn 的反应;可以使用多种烷基锌。此外,许多必需的底物可以通过催化烯烃交叉复分解轻松获得。
Synthesis of all the stereoisomers of 6-methyl-2-octadecanone, 6,14-dimethyl-2-octadecanone, and 14-methyl-2-octadecanone, the components of the female-produced sex pheromone of a moth, Lyclene dharma dharma
作者:Kenji Mori
DOI:10.1016/j.tet.2009.01.092
日期:2009.4
All of the stereoisomers of the components of the female-produced sexpheromone of a moth, Lyclene dharma dharma, were synthesized. They are (R)- and (S)-6-methyl-2-octadecanone, (6R,14R)-, (6R,14S)-, (6S,14R)-, and (6S,14S)-6,14-dimethyl-2-octadecanone, and (R)- and (S)-14-methyl-2-octadecanone. Enantiomers of citronellal and methyl (S)-3-hydroxy-2-methylpropanoate were the starting materials, and
[EN] MACROCYCLIC LACTAMS AND PHARMACEUTICAL USE THEREOF<br/>[FR] LACTAMES MACROCYCLIQUES ET LEUR UTILISATION PHARMACEUTIQUE
申请人:NOVARTIS AG
公开号:WO2005049585A1
公开(公告)日:2005-06-02
The present invention relates to novel macrocyclic compounds of the formula (I) wherein R1, R2, R3, U, V, W, X, Y, Z and n are as defined in the specification, the number of ring atoms included in the macrocyclic ring being 14, 15, 16 or 17, in free base form or in acid addition salt form, to their preparation, to their use as pharmaceuticals and to pharmaceutical compositions comprising them.
An Aminopyridinato Titanium Catalyst for the Intramolecular Hydroaminoalkylation of Secondary Aminoalkenes
作者:Jaika Dörfler、Besnik Bytyqi、Sascha Hüller、Nicola M. Mann、Christian Brahms、Marc Schmidtmann、Sven Doye
DOI:10.1002/adsc.201500287
日期:2015.7.6
2‐(methylamino)pyridinato titanium complex initially synthesized by Kempe is used as catalyst for efficient intramolecularhydroaminoalkylation reactions of secondaryaminoalkenes. The corresponding reactions of N‐aryl‐substituted 1‐aminohept‐6‐enes and 1‐aminohex‐5‐enes directly give access to 2‐methylcyclohexyl‐ or 2‐methylcyclopentylamines in good yields. In addition, intramolecularhydroaminoalkylations of an N‐alkyl‐substituted