Shah, Pallavi et al. published their research in Applied Catalysis, A: General in 2004 | CAS: 1190-39-2

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Reference of 1190-39-2

Synthesis and characterization of tin oxide-modified mesoporous SBA-15 molecular sieves and catalytic activity in trans-esterification reaction was written by Shah, Pallavi;Ramaswamy, Arumugamangalam V.;Lazar, Karoly;Ramaswamy, Veda. And the article was included in Applied Catalysis, A: General in 2004.Reference of 1190-39-2 This article mentions the following:

Mesoporous silica mol. sieve SBA-15 has been synthesized and incorporated with various amounts of tin via incipient-wetness impregnation using tin chloride in ethanol followed by calcination. Characterization was done by x-ray fluorescence spectrophotometry (XRF), powder x-ray diffraction (PXRD), nitrogen adsorption, diffuse reflectance UV (DRUV), scanning and transmission electron microscopy (SEM, TEM), FTIR, 29Si and 119Sn MAS NMR, and Sn-Moessbauer spectroscopic techniques to understand the chem. nature of incorporated tin. The silanol groups on the internal walls of SBA-15 are suggested to be the sites for tin incorporation. Bulk structural characterization techniques (x-ray diffraction and BET) are used to demonstrate that the hexagonal structure is maintained during impregnation. Tin oxide exists as a thin film anchored inside the mesopores of SBA-15. Complementarily, 119Sn NMR and Moessbauer spectroscopies are used to investigate the microstructure of the Sn centers grafted to the mesoporous walls. Sn-Moessbauer spectroscopic studies reveal that Sn2+ may form upon reductive treatments and can probably be stabilized atomically in the pore wall, whereas Sn4+ is stabilized as large entities. While SBA-15 itself shows some activity in transesterification of di-Et malonate with various alcs., Sn-SBA-15 samples are found to possess enhanced catalytic activity for the same. In the experiment, the researchers used many compounds, for example, malonic acid dibutyl ester (cas: 1190-39-2Reference of 1190-39-2).

malonic acid dibutyl ester (cas: 1190-39-2) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Reference of 1190-39-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics