However, the installation of these structures enantioselectively into drug molecules is highly challenging. Here we report straightforward access to enantioenriched sulfinate esters via asymmetric condensation of prochiral sulfinates and alcohols using pentanidium as an organocatalyst. We successfully coupled...
P. Studies on alkyl esters of carboxybenzotriazole as inhibitors for copper corrosion. Corros. Sci. 44, 1257–1276 (2002). 28 Trachli, B., Keddam, M., Takenouti, H. & Srhiri, A. Protective effect of electropolymer- ized 3-amino 1,2,4-triazole towards corrosion of copper in 0.5 ...
The hydrolysis followed by dehydration of the orthoesters led to the synthesis of two new diterpenic acids isolated from Halimium viscosum : 14R,15-dihydroxy-7,13(16)-labdadien-17-oic and 14S,15.dihydroxy-7, 13(16)-labdadien-17-oic....
converted to the liquid ethyl salicylate by addition of ethanol. Yields ofsalicylicacid(week 1) and ethyl salicylate will be found‚ as well as the overall yield of the 2-step conversion of acetylsalicylicacidto ethyl salicylate. Introduction: Esters are formedfromthe reaction ofacidsand alcohols...
Thus, at the industrial scale, the production of glycolipids such as sugar esters is mostly done by chemical synthesis that is cost-effective with reasonably high yields. However, the chemical procedure requires the use of harsh conditions like high temperature, acidic catalysis...
of the plant cell wall. It is found in several soluble forms, as a dimer such as rosmarinic acid but also esterified with quinic acid to form chlorogenic acids. The family of chlorogenic acids includes: (i) monoesters of CafA, pCA and FA; (ii) di-, tri- and tetraesters of CafA, (...
With regards to the study of the influence of reactants’ structures, Chaudry and Popelier (2003) developed a property model to predict the rate constant for hydrolysis of esters by utilizing quantum chemical descriptors. Estrada and Matamala (2007) have used generalized topological indices to ...
14 Smith and colleagues, exploiting gas chromatographic analysis of the scent mark, accomplished the separation of 17 volatile components—16 saturated and unsaturated butyrate esters, as well as squalene; after initial identification by MS, NMR and microozonolysis (in CS2 at −65 °C!), the...
synthesis of hydroquinone and quinone boronate esters, with excellent regioselectivity due to the Lewis acid/base interaction [CO → B(OR)2] in the metallohexatriene intermediate, as shown in Scheme 1.33–35 The substrate of the Dötz reaction can be prepared by Suzuki–Miyaura coupling between...
social status and identity of the donor; however, the chemicals responsible for this interaction remained undefined.14 Smith and colleagues, exploiting gas chromatographic analysis of the scent mark, accomplished the separation of 17 volatile components—16 saturated and unsaturated butyrate esters, as we...