28401-14-1

Usage

General Description

2,2-Dimethyl-3-cyclopentene-1-acetaldehyde is a chemical compound with the molecular formula C9H14O. It is a colorless liquid with a sharp, fruity odor. This chemical is commonly used as a flavoring and fragrance agent in the food and cosmetic industries. It can be found in various fruits and flowers, and is also used in the production of perfumes, soaps, and other scented products. Additionally, it is employed as an intermediate in the synthesis of pharmaceuticals and other organic compounds. Despite its potential uses, 2,2-Dimethyl-3-cyclopentene-1-acetaldehyde may pose health risks if inhaled or ingested, and precautions should be taken when handling this substance.

Upstream product

• 1686-14-2 α-pinene epoxide 

Downstream Products

• 514-15-8 camphor 
• 6709-10-0 2,2-Dimethyl-1-carboxymethyl-cyclopenten-(3) 

Relevant academic research and scientific papers

Phosphonate functionalized carbon spheres as Br?nsted acid catalysts for the valorization of bio-renewable a-pinene oxide totrans-carveol

Herein, we report a simple route for the synthesis of phosphonate functionalized Br?nsted solid acid carbon spheres as heterogeneous catalyst for the valorization of bio-derived a-pinene oxide. The Br?nsted acidity was generatedviatwo steps; hydrothermal carbonization of sugar to produce carbon microspheres followed by PCl3treatment to form phosphonate functionalized carbon. The presence of phosphonate was confirmed by CP-MAS31P and13C NMR. In addition, the presence of the P-C, O-P-C and HO-P?O bonds of the phosphonate group was confirmed by FT-IR,31P NMR, and XPS. SEM-EDAX analysis revealed the presence of a phosphorus content of ~1.71 wt% on the surface of the catalyst while elemental mapping showed a uniform dispersion of phosphorus over the carbon spheres. The as-synthesized Br?nsted solid acid catalyst was used for the isomerization of a-pinene oxide which gave 100% conversion with 67%trans-carveol selectivity in highly polar basic solvent in 1 h reaction time. Also, the catalyst showed good recyclable activity even after five cycles.

Engineering a Highly Defective Stable UiO-66 with Tunable Lewis-Br?nsted Acidity: The Role of the Hemilabile Linker

The stability of metal-organic frameworks (MOFs) typically decreases with an increasing number of defects, limiting the number of defects that can be created and limiting catalytic and other applications. Herein, we use a hemilabile (Hl) linker to create up to a maximum of six defects per cluster in UiO-66. We synthesized hemilabile UiO-66 (Hl-UiO-66) using benzene dicarboxylate (BDC) as linker and 4-sulfonatobenzoate (PSBA) as the hemilabile linker. The PSBA acts not only as a modulator to create defects but also as a coligand that enhances the stability of the resulting defective framework. Furthermore, upon a postsynthetic treatment in H2SO4, the average number of defects increases to the optimum of six missing BDC linkers per cluster (three per formula unit), leaving the Zr-nodes on average sixfold coordinated. Remarkably, the thermal stability of the materials further increases upon this treatment. Periodic density functional theory calculations confirm that the hemilabile ligands strengthen this highly defective structure by several stabilizing interactions. Finally, the catalytic activity of the obtained materials is evaluated in the acid-catalyzed isomerization of α-pinene oxide. This reaction is particularly sensitive to the Br?nsted or Lewis acid sites in the catalyst. In comparison to the pristine UiO-66, which mainly possesses Br?nsted acid sites, the Hl-UiO-66 and the postsynthetically treated Hl-UiO-66 structures exhibited a higher Lewis acidity and an enhanced activity and selectivity. This is further explored by CD3CN spectroscopic sorption experiments. We have shown that by tuning the number of defects in UiO-66 using PSBA as the hemilabile linker, one can achieve highly defective and stable MOFs and easily control the Br?nsted to Lewis acid ratio in the materials and thus their catalytic activity and selectivity.