5660-56-0Relevant academic research and scientific papers
Synthesis of tricarbonyl(diacetylarene)chromium and tricarbonyl(diformylarene)chromium complexes
Kmentova, Iveta,Toma, Stefan
, p. 1616 - 1622 (2002)
Tricarbonylchromium complexes of diacetylbenzenes and 2,2′-diacetylbiphenyl were prepared in reasonable yields by direct complexation of the starting materials. Tricarbonyl-chromium complexes of diformylbenzenes and 2,2′-diformylbiphenyl were prepared in
Simultaneous extraction and controlled chemical functionalization of hardwood lignin for improved phenolation
Bertella, Stefania,Luterbacher, Jeremy S.
supporting information, p. 3459 - 3467 (2021/05/21)
Lignin is a promising candidate for the replacement of fossil-based materials, due to its natural abundance and aromatic structure. This same structure poses major challenges to lignin's exploitation for material development. The harsh conditions generall
Homologative trifluoromethylation of acetals
Hamilton, James Y.,Morandi, Bill,Carreira, Erick M.
, p. 1857 - 1862 (2013/07/26)
Trifluoroethyl α-insertion of acetals has been developed. Aromatic, heteroaromatic, and alkenyl acetals react with in situ generated (trifluoromethyl)diazomethane in the presence of antimony(V) chloride to furnish α-trifluoromethyl acetals. A stereoselective version of this transformation exploiting the acetal as a chiral auxiliary is also presented. Georg Thieme Verlag Stuttgart · New York.
Synthesis of dendrimers with terminal formyl groups
Loim,Kelbyscheva
, p. 2080 - 2085 (2007/10/03)
A method for preparation of dendrons and dendrimers with formyl groups at the terminal aromatic rings, ether bonds in the branching blocks, and ester bonds in the core of the macromolecules is proposed. A way for the selective synthesis of p-hydroxymethylbenzaldehyde is described.
Selective Catalytic Transesterification, Transthiolesterification, and Protection of Carbonyl Compounds over Natural Kaolinitic Clay
Ponde, Datta E.,Deshpande, Vishnu H.,Bulbule, Vivek J.,Sudalai, Ammugam,Gajare, Anil S.
, p. 1058 - 1063 (2007/10/03)
Transesterification and transthiolesterification of β-keto esters with variety of alcohols and thiols and selective protection of carbonyl functions with various protecting groups catalyzed by natural kaolinitic clay are described. The clay has been found to be an efficient catalyst in transesterifying long chain alcohols, unsaturated alcohols, and phenols to give their corresponding β-keto esters in high yields. For the first time, transthiolesterification of β-keto esters with a variety of thiols has been achieved under catalytic conditions. Clay also catalyzes selective transesterification of β-keto esters by primary alcohols in the presence of secondary and tertiary alcohols giving corresponding β-keto esters. A systematic study involving the reactivity of different nucleophiles (alcohols, amines, and thiols) toward β-keto esters is also described. Sterically hindered carbonyl groups as well as α,β-unsaturated carbonyl groups underwent protection without the deconjugation of the double bond. Chemoselective protection of aldehydes in the presence of ketones has also been achieved over natural kaolinitic clay.
Natural kaolinitic clay: A remarkable reusable solid catalyst for the selective functional protection of aldehydes and ketones
Ponde, Datta,Borate,Sudalai,Ravindranathan,Deshpande
, p. 4605 - 4608 (2007/10/03)
Natural kaolinitic clay possessing transition metals such as Fe and Ti in its lattice has been found to catalyze efficiently the chemoselective acetalization and thioacetalization of variety of carbonyl compounds with ethane - 1,2 - diol and ethane - 1,2 - dithiol respectively.
