Hiba, Kottayil; Shaibuna, Machingal; Prathapan, Sreedharan; Sreekumar, Krishnapillai published the artcile< Carboxylic acid functionalized dendronized polymer and homogeneous, reusable metal free acid catalyst for the synthesis of symmetric and unsymmetric xanthene derivatives>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is polyepichlorohydrin acid catalyst dioxooctahydroxanthene tetrahydrobenzoxanthene preparation.
In the present study, carboxylic acid-functionalized tris(hydroxymethyl)propane initiated polyepichlorohydrin cored dendronized polymer (TMP-PECH-COOH) was successfully synthesized. Successful incorporation of carboxylic acid functionality was evidenced by Fourier transform IR spectroscopy (FT-IR), thermogravimetric anal. (TG/DTG), and NMR spectroscopy (1H NMR). Thermodn. properties such as thermal energy, enthalpy, and Gibb’s free energy as well as global reactivity descriptors such as chem. potential, chem. hardness, and electrophilicity index of the TMP-PECH-COOH dendronized polymer were investigated using Gaussian 09 program employing the hybrid d. functional B3LYP method and 6-31G basis set. The synthesized dendronized polymer (TMP-PECH-COOH) could act as a metal-free acid catalyst for catalyzing the reactions for the synthesis of 1,8-dioxooctahydroxanthenes and tetrahydrobenzoxanthene-11-ones under mild reaction conditions in an aqueous medium. The catalyst could be reused at least six times making the present procedure facile, practical, and sustainable. In addition, the efficiency of the present catalyst was compared with some previous reports.
ChemistrySelect published new progress about Cyclocondensation reaction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics