Synthesis of unsymmetrical dinucleating ligands bearing nitrogen and oxygen donor atoms
作者:David E. Fenton、George Papageorgiou
DOI:10.1016/0040-4020(96)00222-0
日期:1996.4
The synthesis of unsymmetrical dinucleating ligands bearingnitrogen and oxygen donor atoms is described. The Schiff-base condensation of functionalised salicylaldehyde derivatives with primary amines gave rise to unsymmetrical unsaturated ligands, whereas condensation with secondary amines followed by in situ reduction of the iminium species with sodium borohydride, led to the formation of unsymmetrical
Substituted sulfonamide compounds corresponding to the formula I
wherein m, n, p, Q, R
1
, R
2
, R
3
, R
4
, X, Y and Z have the respective meanings defined herein, pharmaceutical compositions containing such compounds, a process for their preparation, and the use of such compounds for the treatment and/or inhibition of pain and other conditions mediated by bradykinin receptor 1 (B1R) and/or bradykinin receptor 2 (B2R).
Observations from aminomethylation of 7-substituted 6-hydroxyaurones
作者:Svitlana P. Bondarenko、Mykhaylo S. Frasinyuk
DOI:10.1007/s10593-018-2347-2
日期:2018.8
Aminomethylation of 7-substituted 6-hydroxyaurones was studied using primary and secondary amines. In the case of 6-hydroxy-7-methylaurones, their 5-dialkylaminomethyl derivatives or 7-benzylidene-3,4-dihydro-2Н-furo[3,2-g][1,3]benzoxazin-6(7Н)-ones were formed. The aminomethylation reaction of 6,7-dihydroxyaurones produced only 5-aminomethyl derivatives.
palladium‐catalyzed selective aminomethylation of conjugated 1,3‐dienes with aminals via double C—N bond activation is described. This simple method provides an effective and rapid approach for the synthesis of linear α,β‐unsaturated allylic amines with perfect regioselectivity. Mechanistic studies disclosed that one palladium catalyst cleaved two distinct C—N bond to furnish a cascade double C—N bond activation
Synthesis of analogs of natural 2′-methoxyisoflavones
作者:M. S. Frasinyuk、S. P. Bondarenko、V. P. Khilya
DOI:10.1007/s10600-006-0063-0
日期:2006.3
2-(Un)substituted-2′-methoxy-7-hydroxyisoflavones were synthesized. They were derivatized at the phenol hydroxyl using alkylation and acylation reactions and Mannich base formation.