o.Formylarylazomethylenetriphenylphosphoranes: A facile thermally promoted rearrangement to 3-oxo-indazoline and 4-oxo-dihydroquinazoline derivatives
作者:A. Alemagna、P. Del Buttero、E. Licandro、S. Maiorana、A. Papagni
DOI:10.1016/s0040-4020(01)96683-9
日期:——
s carrying an electron withdrawing group on the ylidic carbon undergo thermal intra molecular cyclization to 3-oxo-indazolin-2-yl-methylenetriphenylphosphorane derivatives. The latter compounds, and their 1-alkyl derivatives, in turn, undergo thermal and/or acid catalyzed rearrangement to 4-oxo-l,4-dihydroquinazoline derivatives and PPh3. Some possible reaction mechanisms are discussed, and some synthetic
The coupling of diazonium salts fromisaticacids with alkoxycarbonylmethylenephosphoranes leads directly to 3-oxo-indazolin-2-yl-(alkoxycarbonyl) methylenetriphenylphosphoranes, while coupling with methyl 2-chloroacetacetate gives 2-[2-(methoxycarbonyl-chloromethyliden)hydrazino] -phenyl-glyoxylic acid.
Compound for enhancing the coupling degree of complex TRPV4-KCa2.3 and anti-hypertension applications thereof
申请人:Jiangnan University
公开号:US10336712B2
公开(公告)日:2019-07-02
The applicant provides a compound for enhancing the space coupling degree of an endothelial cell ion channel complex TRPV4-KCa2.3 and anti-hypertension applications thereof. By finding the structural domains of the interacting sites of the endothelial cell ion channel complex TRPV4-KCa2.3, a compound with specificity which can act at the two interacting sites is prepared in the present invention. It is found that the compound can enhance the space coupling degree of the TRPV4-KCa2.3 complex and has great significance for the research and development of anti-hypertension drugs.
Reactions of ethyl oxamate and dialkyl oxalates with anthranilic acid derivatives
作者:L. A. Shemchuk、V. P. Chernykh、P. S. Arzumanov、O. S. Krys’kiv
DOI:10.1134/s1070428007050120
日期:2007.5
Ethyl oxamate reacted with anthranilic acid derivatives at the amide or the ester group leading to the formation of respective esters or amides. A simple method was developed for preparation of alkyl 3-amino-4-oxo-3,4-dihydroquinazoline-2-carboxylates.
ALEMAGNA, A.;BUTTERO, P. DEL;LICANDRO, E.;MAIORANA, S.;PAPAGNI, A., TETRAHEDRON, 1985, 41, N 16, 3321-3330
作者:ALEMAGNA, A.、BUTTERO, P. DEL、LICANDRO, E.、MAIORANA, S.、PAPAGNI, A.