Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Ingmar Held"'
Publikováno v:
Synthesis. 2009:2267-2277
A series of 3-alkyl-4-guanidinylpyridines with variable alkylation pattern have been synthesized and characterized with respect to their catalytic potential in acylation reactions of alcohols. The ability of the substitution pattern to stabilize acyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e92feb567d7b54d4d6e7d4125ba097cc
https://doi.org/10.1055/s-0029-1216830
https://doi.org/10.1055/s-0029-1216830
Publikováno v:
Advanced Synthesis & Catalysis. 350:1891-1900
The combined use of high concentration conditions, auxiliary bases, and new catalysts allows for the rapid synthesis of sterically hindered carboxylic acid esters at room temperature. Mechanistic analysis indicates the intermediate formation of acid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::edcabfc29acdc4abaa63c2cc3cf4d43d
https://doi.org/10.1002/adsc.200800268
https://doi.org/10.1002/adsc.200800268
Publikováno v:
Synthesis. 2007:1185-1196
Derivatives of 3,4-diaminopyridine have been synthesized and studied as catalysts for acyl-transfer reactions. The design of these catalysts is guided by the stability of their acetyl intermediates as determined through theoretical calculations at th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::691a1b7ae5e1d0005b4fbe10660d4f59
https://doi.org/10.1055/s-2007-965973
https://doi.org/10.1055/s-2007-965973
Publikováno v:
Synthesis. :1425-1430
The stability of acylpyridinium cations can be used as a predictive tool for the development of catalysts for acyl transfer reactions based on the 4-aminopyridine motive. Substituents in 2-position of the pyridine ring are detrimental to both, the ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43892a9fd0cb2dc07d1d8fdb42ef264
https://doi.org/10.1055/s-2005-865317
https://doi.org/10.1055/s-2005-865317
Publikováno v:
Organic & Biomolecular Chemistry. 4:4223
The conformational properties and the stability of acylpyridinium intermediates formed in pyridine-catalyzed acylation reactions have been studied at the SCS-MP2(FC)/6-311 +G(d,p)//MP2(FC)/ 6-31G(d) level of theory. It has been shown that stacking in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee45e4fd86b933127f4bfe6984327584
https://doi.org/10.1039/b610140b
https://doi.org/10.1039/b610140b
Publikováno v:
Chemistry - A European Journal; Aug2005, Vol. 11 Issue 16, p4751-4757, 7p