2-Acyloxy-4,6-dimethoxy-1,3,5-triazine - A New Reagent for Ester Synthesis
作者:Janina E. Kamińska、Zbigniew J. Kamiński、Józef Góra
DOI:10.1055/s-1999-3448
日期:1999.4
2-Acyloxy-4,6-dimethoxy-1,3,5-triazines obtained in reaction between carboxylic acid and 2-chloro-4,6-dimethoxy-1,3,5-triazine were used as acylating agents for the synthesis of esters from primary, secondary, and tertiary alcohols. Because of mild acylation conditions the method could be applied to esterification of labile alcohols with aromatic and aliphatic (also α-branched) acids in good yields.
<i>N</i>-Triazinylammonium Tetrafluoroborates. A New Generation of Efficient Coupling Reagents Useful for Peptide Synthesis
作者:Zbigniew J. Kamiński、Beata Kolesińska、Justyna Kolesińska、Giuseppina Sabatino、Mario Chelli、Paolo Rovero、Michał Błaszczyk、Marek L. Główka、Anna Maria Papini
DOI:10.1021/ja054260y
日期:2005.12.1
carboxylic acids by using this reagent proceeds via triazine "superactive ester". The couplingreagent was successfully used for the synthesis of Z-, Boc-, and Fmoc-protected dipeptides derived from natural and unnatural sterically hindered amino acids and for fragment condensation, in 80-100% yield and with high enantiomeric purity. The manual SPPS of the ACP(65-74) peptide fragment (H-Val-Gln-Ala-A
A palladium-catalyzed one-pot procedure for the synthesis of aryl ketones has been developed. Triazine esters when coupled with aryl boronic acids provided aryl ketones in moderate to excellent yields (up to 95%) in the presence of 1 mol % Pd(PPh3)2Cl2 for 30 min.
An Efficient One-pot N-Acylation of Deoxy- and Ribo-cytidine Using Carboxylic Acids Activated in situ with 2-Chloro-4,6-dimethoxy-1,3,5-triazine
作者:Ambadas B. Rode、Sang-Jun Son、In-Seok Hong
DOI:10.5012/bkcs.2010.31.7.2061
日期:2010.7.20
acylation, Nucleoside protection, 2-Chloro-4,6-dimethoxy-1,3,5-triazine, Activated acyl group, Single-step protectionSynthetic oligonucleotides (ODNs) are an emerging class of drug molecules with a broad spectrum for therapeutic appli-cations. In the ODNs synthesis, a fundamental process is the internucleotide-bond formation achieved
A fast and efficient one-pot microwave assisted synthesis of variously di-substituted 1,2,4-oxadiazoles
作者:Andrea Porcheddu、Roberta Cadoni、Lidia De Luca
DOI:10.1039/c1ob06055d
日期:——
A one-pot two-step microwaveassistedsynthesis of variously disubstituted 1,2,4-oxadiazoles from carboxylic acids and amidoximes is reported. This methodology is characterized by short reaction times, is versatile, robust and high-yielding and allows for the preparation of heterocycles with a stereocenter with 100% enantiomeric purity.