In situ slow release of isocyanates: synthesis and organocatalytic application of N-acylureas
作者:Atul K. Singh、Ruchi Chawla、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2013.07.045
日期:2013.9
A novel, efficient, and operationally simple one-pot synthesis of both, symmetrical and unsymmetrical N-acylureas from carboxamides and in situ generated isocyanates (from N,N-dibromo-p-toluenesulfonamide) in the presence of a mild base at rt is reported. The protocol avoids the tedious isolation and purification steps of hazardous isocyanates. The first application of these acylureas to the catalysis
Einige N‐Acyl‐Harnstoffe ergeben in einer Spaltungsreaktion mit Aminen nicht nur die gleichen Produkte wie freie Isocyanate, sondern zeigen in Abhängigkeit von der Basizität der Nucleophile und den elektronischen Einflüssen der Substituenten eine Reihe nicht erwarteter Reaktionen.
Heterocyclic Rearrangements in Constrained Media. A Zeolite-Directed Photorearrangement of 1,2,4-Oxadiazoles
作者:Andrea Pace、Silvestre Buscemi、Nicolò Vivona
DOI:10.1021/jo047910+
日期:2005.3.1
The first intrazeolite-photoinduced rearrangement of a five-membered heterocycle is reported. A completely different behavior compared to solution irradiations has been observed. The zeolite's role in directing the photoreaction of 3-phenyl-1,2,4-oxadiazoles toward the formation of the corresponding 1,3,4-oxadiazoles in a ring contraction−ring expansion route is discussed.
Pyrido[2,3-d]pyrimidines as Wnt antagonists for treatment of cancer and arthritis
申请人:Deutsches Krebsforschungszentrum
Stiftung des öffentlichen Rechts
公开号:EP2266984A1
公开(公告)日:2010-12-29
Compounds according to the general formula (I)
their solvates, hydrates, esters and pharmaceutically acceptable salts, their use for modulating the Wnt signalling pathway activity and their use as a medicament, preferably for the treatment of cancer.
A compound represented by formula (1) is described:
The compound has an excellent efficacy for controlling weeds, and is thus useful as an active ingredient for an agent for controlling weeds.