6624-73-3Relevant articles and documents
Solvent-free synthesis of symmetric methylene diestersviadirect reaction of aromatic carboxylates with 1,n-dihaloalkanes
Bai, Lin,Ding, Shenglong,Ma, Xiaofang
, p. 28711 - 28715 (2021/09/22)
An efficient methodology for the synthesis of symmetrical methylene diesters was developed through direct reaction of various aromatic carboxylates with 1,n-dihaloalkanes under solvent-free conditions. This strategy offers a high product yield, facile work-up and purification, and an environmentally friendly approach to obtain long-chain methylene carboxylate scaffolds with increased diversity.
Chemo- and stereoselective monobenzoylation of 1,2-diols catalyzed by organotin compounds
Iwasaki, Fumiaki,Maki, Toshihide,Onomura, Osamu,Nakashima, Waka,Matsumura, Yoshihiro
, p. 996 - 1002 (2007/10/03)
A new facile method for monoacylation of diols has been developed. A variety of cyclic and acyclic diols, in particular 1,2-diols, were selectively monobenzoylated in good yields by the reaction with benzoyl chloride in the presence of a catalytic amount of dimethyltin dichloride and inorganic bases such as potassium carbonate. Furthermore, the method was successfully applied to a kinetic resolution of racemic 1-phenyl-1,2- ethanediol using a chiral organotin catalyst. The ee was dependent on the kind of base, water as an additive, and the reaction temperature.
Dipole-Dipole Interactions between the Terminal Groups of l,n-Diarenecarboxy Alkanes, n=1, 2, ..., 6
Macanita, Antonio L.,Magalhaes, Jorge,Dias, Antonio,Teles, Henrique,Iglesias, Emilia
, p. 4011 - 4016 (2007/10/02)
The mutual interaction between the end groups of bichromophoric molecules is studied using absorption and fluorescence techniques (steady-state and time-resolved).With three series of di-1,n-arenecarboxyalkanes (arene = benzene, naphthalene and anthracene; n = 1,2,3,5 and 6) and a series of 1-pyrenecarboxy, n-(N-methyl, N-phenylamino) alkanes (n = 2,3,4,5,6 and 9), it is found that model compounds such as the methyl, ethyl and hexyl esters of benzene, naphthalene, anthracene and pyrene differ from the bichromophoric compounds in their absorption and emission spectra, molar absorption coefficients and radiative rate constants.These differences decrease with the mean value of the sixth power of the end-to-end distance, being attributed to dipole-dipole interactions between the end groups.The terminal group induces mixing of the lowest excited singlet state with higher energy states and increases the local polarizability of the medium.Two methods for evaluating the unquenched fluorescence lifetimes of bichromophoric compounds are discussed.
