產(chǎn)品屬性：

Cas No.: 13653-84-4

別名: N/A

化學(xué)名: [1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid

分子式: C20H14O4

分子量: 318.32

溶解度: N/A

儲(chǔ)存條件: N/A
General tipsFor obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.

Shipping ConditionEvaluation sample solution : ship with blue ice

All other available size: ship with RT , or blue ice upon request

產(chǎn)品描述：

Rink resin is originally developed for SPS of peptide amides. Now the scope of its application is extended from carboxylic amides to the immobilization of amines, substituted amides. Libaries of primary amines have been synthesized by the treatment of Rink amine resin with aldehyde to form aldimines, which are subsequently reacted with Grignard reagents or lithium reagents to yield amines that are not commercially available. These amines are released from resin by treatmnet with TFA-water-DCM (5:5:90) for 5 h at room temperature. N-Substituted amides are obtained by reducing the above-mentioned aldimines with Na(CN)BH3 to the corresponding amines, followed by acylation with acid chlorides or symmetrical anhydrides. The produts are cleaved with TFA-water-DCM (5:1:94) for 20 min at room temperature. Direct functionalization of Rink amide resin with nucleophiles has also been reported. The Fmoc protecting group can be readly removed with 20% piperidine in DMF prior to the above manipulation. Rink amide resin: 4-(2',4'-Dimethoxyphenyl-Fmoc-aminomethyl-phenoxy-acetamido- norleucylaminomethyl resin; Substitution: 0.4 - 0.8 mmole/g resin; Bead size 100- 200 mesh (polystyrene- 1% DVB)Structure: Application: Li et al reported a simple, clean, high yielding and linker-free method for the synthesis of disubstituted guanidines by using Rink amide resin as an amine component [1]. Decomposition of the resin linkers during TFA cleavage of the peptides in the Fmoc strategy leads to alkylation of sensitive amino acids. The C-terminal amide alkylation, reported for the first time, is shown to be a major problem in peptide amides synthesized on the Rink amide resin. This side reaction occurs as a result of the Rink amide linker decomposition under TFA treatment of the peptide resin. The use of 1,3-dimethoxybenzene in a cleavage cocktail prevents almost quantitatively formation of C-terminal N-alkylated peptide amides. Oxidized by-product in the tested Cys- and Met-containing peptides were not observed, even if thiols were not used in the cleavage mixture[2].
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