acylation


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Related to acylation: alkylation

acylation

[‚as·ə′lā·shən]
(organic chemistry)
Any process whereby the acyl group is incorporated into a molecule by substitution.
References in periodicals archive ?
Smith et al., "Cross-sectional associations of acylation stimulating protein (ASP) and adipose tissue gene expression with estradiol and progesterone in pre-and postmenopausal women," Clinical Endocrinology, vol.
It is well known that premature polymer precipitation from initially homogeneous solution in Friedel-Crafts acylation polycondensation synthesis prevents further macromolecular chain growth reactions and produces polymer of undesirably low molecular weight and of poor thermal stability.
Post-crosslink reactions are carried out with 4,4'TDA as a crosslinker and the carboxylic acid groups in TDA can undergo Friedel-Craft acylation with the phenyls pendent rings in sulfonated poly(arylene ether sulfone)s copolymers to prepare PEMs for fuel cell applications.
It is generally accepted that premature polymer precipitation from initially homogeneous solution in Friedel-Crafts acylation polycondensation synthesis prevents further macromolecular chain growth reactions and produces polymer of undesirably low molecular weight and of poor thermal stability.
The other absorption peaks observed at 1600-1700 [cm.sup.-1] correspond to the stretching vibrations of C=0 groups, which were directly bonded to graphenes via the Friedel-Crafts acylation of 4-aminobenzoic acid.
Therefore, not only did all samples require acylation, but for the catecholamine immunoassays, enzyme-catalyzed methylation to convert fE and fNE into free metanephrine and normetanephrine was also needed.
Briefly, loading of the Fmoc-Gly-OH to Rink amide resin and all acylation reactions were carried out for 1 h using a 3-fold excess of Fmoc-amino acids activated with DIC (3.5 mmol) in the presence of HOBt (3.5 mmol).
Summary: Acylation of human insulin was studied using, C2 and C12 transfer reagents, N- succinimidyl acetate and N-succinimidyl dodecanoate (lauryl) respectively.
Boron trifluoride finds application as a catalyst in a diverse range of chemical reactions such as isomerisation, alkylation, polymerisation, esterfication, condensation, cyclization, hydration dehydration, sulfonation, desulphurisation, nitration, halogenation oxidation and acylation. In terms of revenue, the catalyst segment is projected to witness significant growth over the forecast period while expanding at a CAGR of 5.5% during 2017 -- 2027.
In the work reported in this article, the low-molecular-weight polymers polyethylene glycol (PEG) and PVA [20] were grafted onto a fiber surface by the acidification treatments of acylation and esterification.
Summary: Acylated low molecular weight chitosans (LChA) were prepared from nucleophilic acylation of chitosan using acid anhydrides of short and medium chain length (4 - 10) to study the response of applied heat as a function of acyl chain length.