217320-69-9

Upstream product

• 108-94-1 cyclohexanone 
• 135-02-4 ortho-anisaldehyde 
• 58378-33-9 o-anisaldehyde dimethyl acetal 
• 22780-11-6 1-(2,2,2-trichloroacetoxy)cyclohexene 
• 6651-36-1 1-(Trimethylsilyloxy)cyclohexene 

Downstream Products

• 2702-76-3 2-(2-methoxy-benzyl)-cyclohexanone 

Relevant academic research and scientific papers

Isothiouronium salt based chiral proline amide as efficient bifunctional organocatalyst for direct asymmetric aldol reactions in aqueous medium

We developed the first chiral proline amide-isothiouronium based bifunctional organocatalyst, it was prepared by methylation of the corresponding thiourea. This asymmetric catalyst provides aldol products in high to quantitative yields while achieving exc

“Ship-in-a-Bottle” Strategy for Immobilization of 9-Amino(9-deoxy)epi-Cinchona Alkaloid into Molecularly Imprinted Solid Acid: Acetal Hydrolysis/Asymmetric Aldol Tandem Reaction

Direct immobilization of versatile 9-amino(9-deoxy)epi-cinchona alkaloids without molecule modification to achieve heterogeneous organocatalysis is of interest in the low-cost production of optically active compounds. In this paper, an exquisite “ship-in-a-bottle” strategy for direct and simple immobilization of 9-amino-(9-deoxy)epi-quinine (QNNH2) into hollow polystyrene nano-bowl with imprinted free space around ?SO3H was developed via acid-base reaction and radical polymerization. The heterogeneous organocatalyst with 0.44 mmol g?1 of QNNH2 and 0.48 mmol g?1 of residual ?SO3H possessed fast mass transfer due to the characteristic architectural features, such as thin shell thickness, free space around catalytic site, and hollow interior. In heterogeneous acetal hydrolysis/asymmetric aldol tandem reaction, good to excellent catalytic performances (90–95 % yields, anti/syn=88/12–96/4, and 97–99 % ee anti) for acetals bearing electron-withdrawing substituents (R=o, m, p-NO2, Cl) were achieved. The “ship-in-a-bottle” QNNH2 displayed good stability and reusability with excellent catalytic performances in the reuses.

Chiral proline sulfonamide bifunctional catalyst and preparation method and application thereof

The invention discloses a novel chiral sulfonamide bifunctional catalyst and a preparation method and application thereof. The catalyst comprises a compound A or a compound B. The molecular structureof the compound A is shown as a formula (I) which is des

Organocatalytic asymmetric aldol reaction using protonated chiral 1,2-diamines

Organic-catalyzed stereoselective reactions have gained attention because they avoid the problems associated with metal catalysts, but existing catalysts based on proline have limitations. Therefore, (R,R)-(+)-1,2-diphenylethylenediamine (DPEN) was select

Preparation and characterization of magnetic graphene nanocomposite containing Cu(proline)2 as catalyst for asymmetric aldol reactions

A new catalyst has been prepared via immobilization of Cu(proline)2 complex onto the surface of magnetic graphene. The fabricated nanocatalyst was characterized by Fourier-transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (PXRD) analysis, vibrating-sample magnetometry (VSM), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectroscopy, transmission electron microscopy (TEM), inductively coupled plasma (ICP) techniques, and elemental analysis. Its catalytic performance was investigated in the aldol reaction using a mild and ecofriendly procedure. The synthesized nanocomposite, which contains Cu(II) center as Lewis acid, was found to be an efficient catalyst for asymmetric aldol reactions, affording corresponding aldol products in high yield and excellent enantiomeric excess (> 90?%). The examined catalyst was prepared from low-cost, easily available starting materials and can be readily isolated by magnetic decantation for recycling and reuse in consecutive reactions without significant loss of activity.

New prolinamides with isosteviol skeleton as efficient organocatalysts for the direct asymmetric aldol reaction

Abstract: In this work, two new prolinamides with isosteviol skeleton were synthesized and used as chiral catalysts for the asymmetric aldol reaction. Solvent effects, catalyst loading, substrate scope and the influence of water on the reaction were inves

Improving the Catalytic Performance of (S)-Proline as Organocatalyst in Asymmetric Aldol Reactions in the Presence of Solvate Ionic Liquids: Involvement of a Supramolecular Aggregate

For the first time, a highly efficient and stereoselective asymmetric aldol reaction employing (S)-proline in the presence of solvate ionic liquids is reported. The reaction seems to proceed via a supramolecular aggregate of (S)-proline, the solvate ionic

(2S,4R)-Hyp-(S)-Phe-OMe dipeptide supported on imidazolium tagged molecules as recoverable organocatalysts for asymmetric aldol reactions using water as reaction medium

Four novel chiral imidazolium tagged molecules derived from dipeptide (2S,4R)-Hyp-(S)-Phe-OMe were prepared and evaluated as organocatalysts in the asymmetric aldol reaction using water as solvent. It was found that catalysts incorporating the hexanoyl linker are active down to 5 mol% and afford aldol products with up to 94% yield, up to 98:2 dr and up to 97:3 er. This chiral imidazolium catalyst was reused up to 6 times without any loss in the stereoselectivity of asymmetric aldol reactions. By contrast, organocatalysts containing an acetyl linker proved to be highly unstable in protic solvents, and for that reason they could not be recovered and reused.

Different bio/Lewis acid-catalyzed stereoselective aldol reactions in various mediums

In this work eight different crude biocatalysts together with six Lewis and three Br?nsted acids were used for asymmetric aldol reactions of aromatic, heteroaromatic, cyclic, and acyclic six ketones and eleven aldehydes. Optimum reaction conditions were d

A phosphotungstic acid-supported multifunctional organocatalyst containing 9-amino(9-deoxy): Epi -cinchonidine and Br?nsted acid and its application in asymmetric aldol reaction

A novel type of supported multifunctional organocatalyst CDNH2(n)-HPW combined 9-amino(9-deoxy)epi-cinchonidine (CDNH2) with Br?nsted acid in the backbone of phosphotungstic acid was developed via facile precipitation of sodium tungs