Relay Catalysis To Synthesize β-Substituted Enones: Organocatalytic Substitution of Vinylogous Esters and Amides with Organoboronates
作者:Sasha Sundstrom、Thien S. Nguyen、Jeremy A. May
DOI:10.1021/acs.orglett.9b04584
日期:2020.2.21
Organocatalysis was shown to facilitate conjugate additions to vinylogousesters and amides for the first time. Subsequent elimination of a β-alcohol or amine provided π-conjugated β-substituted enones. Remarkably, nucleophile addition to the electron-rich vinylogous substrates is more rapid than classical enones, forming monosubstituted products. A doubly organocatalytic (organic diol and methyl aniline)
Enantioselective Heck Arylation of Acyclic Alkenol Aryl Ethers: Synthetic Applications and DFT Investigation of the Stereoselectivity
作者:Ellen Christine Polo、Martí Fernández Wang、Ricardo Almir Angnes、Ataualpa A. C. Braga、Carlos Roque Duarte Correia
DOI:10.1002/adsc.201901471
日期:2020.2.21
Heck‐Matsuda adducts were further converted into more complex and valuable scaffolds including their syntheticapplication in the synthesis of (R)‐Fluoxetine, (R)‐Atomoxetine, and in the synthesis of an enantioenriched benzo[c]chromene. Finally, in silico mechanistic investigations into the reaction'senantioselectivity were performed using density functional theory.
在本文中,我们报告了无环E和Z链烯基芳基醚的对映选择性Heck-Matsuda芳基化。反应在温和的条件下进行,以区域选择性的方式得到对映体富集的苄基醚,中等至良好的收率(高达73%),以及良好至优异的对映体比率(高达97:3)。对映体选择性的Heck-松田芳基化已经显示出宽范围(25个实施例),并且一些关键的Heck-松田加合物进一步转化成更复杂的和有价值的支架包括在(合成及其合成应用- [R)-Fluoxetine,(- [R )-托莫西汀,以及在对映体富集的苯并[ c ]色烯的合成中。最后,在计算机上 使用密度泛函理论对反应的对映选择性进行了机理研究。
[EN] FRAGRANCE COMPOSITIONS COMPRISING COMPOUNDS WITH OLFACTORY QUALITIES<br/>[FR] COMPOSITIONS PARFUMÉES COMPRENANT DES COMPOSANTS AYANT DES QUALITÉS OLFACTIVES
申请人:P2 SCIENCE INC
公开号:WO2017139637A1
公开(公告)日:2017-08-17
The application relates to compositions comprising compounds of Formula I, Formula II, or Formula III and the use of these compositions in the fragrance industry, i.e., for the production of perfumes, air fresheners, laundry detergents, household cleaning products, liquid or bar soaps, shampoos, conditioners, hair sprays, cosmetics, deodorants, insect repellants, insecticides, and pet litter.
A New Organocatalytic Process of Cyclotrimerization of Acetylenic Ketones Mediated by 2,4-Pentanedione
作者:Song Xue、Qing-Fa Zhou、Fei Yang、Qing-Xiang Guo
DOI:10.1055/s-2007-967997
日期:2007.2
organocatalytic process of cyclotrimerization of the aliphatic and aromatic acetylenic ketones was developed. The reaction catalyzed by DMAP in the presence of 2,4-pentanedione gave 1,3,5-trisubstituted benzenes in almost quantitative yields under very mild conditions. 2,4-Pentanedione was used as a cocatalyst to promote the reaction efficiently, particularly for aliphatic acetylenic ketones.
Redox-neutral rhodium(<scp>iii</scp>)-catalyzed chemo- and regiospecific [4 + 1] annulation between benzamides and alkenes for the synthesis of functionalized isoindolinones
作者:Jin Qiao、Hui Mao、Shiyao Lu、Xiaoning Zhang、Hangcheng Ni、Yangbin Lu
DOI:10.1039/d1ob01792f
日期:——
Herein, using electron-deficient alkenes embedded with an oxidizing function/leaving group as a rare and nontraditional C1 synthon, we have achieved the redox-neutralRh(III)-catalyzed chemo- and regioselective [4 + 1] annulation of benzamides for the synthesis of functionalized isoindolinones. This method features broad substrate scope, good to excellent yields, excellent chemo- and regioselectivity
在此,我们使用嵌入氧化功能/离去基团的缺电子烯烃作为稀有和非传统的 C 1合成子,实现了氧化还原中性 Rh( III ) 催化的化学和区域选择性 [4 + 1] 苯甲酰胺环化功能化异吲哚啉酮的合成。该方法具有广泛的底物范围、良好的收率、优异的化学和区域选择性、良好的官能团耐受性和温和的无外部氧化剂条件。