Iron-Catalyzed Highly Enantioselective Addition of Silyl Enol Ethers to α,β-Unsaturated 2-Acyl Imidazoles
作者:Jinhu Wei、Jie-Sheng Huang、Chi-Ming Che
DOI:10.1021/acs.orglett.1c02699
日期:2021.9.3
FeII(N4) complex (N4 = (R,R)-N,N′-bis(2-isopropylquinolin-8-yl)-1,2-diphenylethane-1,2-diamine) was developed for the asymmetric conjugate addition of silyl enol ethers, including both acyclic ones and cyclohexenone-derived ones, to α,β-unsaturated 2-acyl imidazoles. This FeII complex is an effective chiral Lewis acid and was applied in the synthesis of an array of chiral 1,5-dicarbonyl synthons and cyclohexenone
开发了手性 Fe II (N4) 配合物 (N4 = ( R , R )- N , N '-bis(2-isopropylquinolin-8-yl)-1,2-diphenylethane-1,2-diamine) 用于不对称甲硅烷基烯醇醚(包括无环和环己烯酮衍生的)与 α,β-不饱和 2-酰基咪唑的共轭加成。这种 Fe II 配合物是一种有效的手性路易斯酸,用于合成一系列手性 1,5-二羰基合成子和环己烯酮衍生物,具有高产率和对映选择性(高达 99% ee)。
Rhodium‐Catalyzed Enantioselective [4+2] Cycloadditions of Vinylcarbenes with Dienes
作者:Bowen Zhang、Huw M. L. Davies
DOI:10.1002/anie.201914354
日期:2020.3.16
The reaction of 2-siloxycyclo-1,3-dienes with E-vinyldiazoacetates in the presence of the bulky chiral dirhodium tetracarboxylate catalyst, Rh2 (R-p-PhTPCP)4 results in an enantioselective [4+2] cycloaddition, in which three new stereogenic centers are formed. The [4+2] cycloadducts are generated as single diastereomers with high enantiocontrol (95-98 % ee). When the diene contains an additional stereogenic
Catalytic, Highly Enantio, and Diastereoselective Nitroso Diels−Alder Reaction
作者:Yuhei Yamamoto、Hisashi Yamamoto
DOI:10.1021/ja049849w
日期:2004.4.1
This communication presents studies that nitroso Diels-Alder adduct has been furnished in uniformly high yield and high enantioselectivity using nitrosopyridine as a substrate and copper as a catalyst. The obtained Diels-Alder adduct was easily transformed to corresponding chiral amino alcohols without loss of enantioselectivity.
[EN] CATALTYTIC ASYMMETRIC HETERO DIELS-ALDER REACTION OF A HETEROAROMATIC C-NITROSO DIENOPHILE: A NOVEL METHOD FOR SYNTHESIS OF CHIRAL NON-RACEMIC AMINO ALCOHOLS<br/>[FR] REACTION HETERO DIELS-ALDER IMPLIQUANT UN DIENOPHILE C-NITROSO HETEROAROMATIQUE : NOUVEAU PROCEDE DE SYNTHESE D'AMINO-ALCOOLS NON RACEMIQUES CHIRAUX
申请人:UNIV CHICAGO
公开号:WO2005068457A1
公开(公告)日:2005-07-28
The present invention is directed to a catalytic asymmetric C-nitroso Diels-Alder reaction.
本发明涉及一种催化不对称C-亚硝基Diels-Alder反应。
Enantioselective Nitroso-Diels-Alder Reaction and Its Application for the Synthesis of (−)-Peracetylated Conduramine A-1
作者:Chandan Kumar Jana、Stefan Grimme、Armido Studer
DOI:10.1002/chem.200901331
日期:2009.9.14
CuI‐catalyzed enantioselective nitroso‐Diels–Alderreactions (NDA reactions) of 2‐nitrosopyridine with various dienes are presented. The [CuPF6(MeCN)4]/Walphos‐CF3 catalyst system is best suited to catalyze the NDA reaction of various dienes by using 2‐nitrosopyridine as a dienophile. In most of the cases studied, cycloadducts are obtained in quantitative yield with very good to excellent enantioselectivities