AUS Benzyloxyacetaldehyd(3)UND DEM chirlalenBoronsäureester 4 erhielt人第三人以diastereoselektive CC-Verknüpfung巢穴Homoallylalkohol 5。Daraus wurden durch酒精标准操作8和Weiter(–)-δ-Multistriatin(1),含97%异戊二烯。
AUS Benzyloxyacetaldehyd(3)UND DEM chirlalenBoronsäureester 4 erhielt人第三人以diastereoselektive CC-Verknüpfung巢穴Homoallylalkohol 5。Daraus wurden durch酒精标准操作8和Weiter(–)-δ-Multistriatin(1),含97%异戊二烯。
1,2-Diastereoselective C-C Bond-Forming Reactions for the Synthesis of Chiral β-Branched α-Amino Acids
作者:Thomas Spangenberg、Angèle Schoenfelder、Bernhard Breit、André Mann
DOI:10.1002/ejoc.201000865
日期:2010.11
S N 2' sequences have been employed for the synthesis of β-branchedα-aminoacids using 1,2-diastereocontrol for forming C―C bonds. An oxazolidine fragment derived from Garner's aldehyde provides the handle for facial discrimination and acts as a masked amino acid functionality. This study encompasses directed and non-directed allylic substitution reactions. The stereocontrol of the oxazolidine appendage
SN 2' 序列已用于合成 β-支链 α-氨基酸,使用 1,2-非对映控制形成 C-C 键。来自 Garner 醛的恶唑烷片段提供了面部识别的手柄,并充当了掩蔽的氨基酸功能。该研究包括定向和非定向烯丙基取代反应。还研究了末端烯烃加氢甲酰化过程中恶唑烷附属物的立体控制。公开了了解反应的非对映化学结果以及合成应用的努力。
Synthesis of Optically Active β- or γ-Alkyl-Substituted Alcohols through Copper-Catalyzed Asymmetric Allylic Alkylation with Organolithium Reagents
作者:Sureshbabu Guduguntla、Martín Fañanás-Mastral、Ben L. Feringa
DOI:10.1021/jo401536u
日期:2013.9.6
An efficient one-pot synthesis of optically active β-alkyl-substituted alcohols through a tandem copper-catalyzedasymmetricallylicalkylation (AAA) with organolithium reagents and reductive ozonolysis is presented. Furthermore, hydroboration–oxidation following the Cu-catalyzed AAA leads to the corresponding homochiral γ-alkyl-substituted alcohols.
Stereoselective synthesis of syn and anti 1,2-hydroxyalkyl moieties by Cu-catalyzed asymmetric allylic alkylation
作者:Martín Fañanás-Mastral、Bjorn ter Horst、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1039/c0cc05161f
日期:——
A stereoselective synthesis of 1,2-hydroxyalkyl moieties is described herein. These valuable buildingblocks are obtained with complete regiocontrol and excellent stereocontrol both for the syn or the anti products, by choosing the appropriate enantiomer of the ligand in a copper-catalyzedasymmetricallylicalkylation of delta-alkoxy-substituted allyl bromides.