通过电子自旋共振(ESR)和红外(IR)光谱鉴定,4-喹啉基叠氮化物22的基质光解可得到4-喹啉基硝烯21。还观察到分配给叠氮苯23(1741 cm -1)的次要吸收。进一步的光解作用会在1902和1909 cm -1处归因于环状酮亚胺19,而在2044 cm -1处归因于开链酮亚胺26且在1982 cm -1处具有较弱的吸收,归因于开环腈。25。2-(5-四唑基)喹喔啉14和三唑并[1,5- a对喹喔啉16在2084 cm -1处产生吸收,这是由于重氮化合物15在温和的快速真空热解(FVT)中形成,并带有Ar基质分离产物。16的基质光解得到重氮化合物15,环状酮亚胺19和开链酮亚胺26。2-喹喔啉基卡宾17也在基质光解中形成,并通过其ESR光谱进行鉴定。FVT为22或15/16时,可以得到4-喹啉基亚硝烯,由Ar-矩阵ESR光谱确定。在两个FVT和光解实验中从这22个中获得的第二个氮烯E
C–N Bond Formation by the Oxidative Alkylamination of Azines: Comparison of AgPy2MnO4 versus KMnO4 as Oxidant
作者:Anna V. Gulevskaya、Bert U. W. Maes、Caroline Meyers、Wouter A. Herrebout、Benjamin J. van der Veken
DOI:10.1002/ejoc.200600573
日期:2006.12
successful oxidativealkylamination of azines by the SNH-reaction, with the use of alkylamines other than methylamine, are very scarce. Hitherto, the experimental limitation to extend oxidative amination of azines with NH3/KMnO4 to oxidativealkylamination is solely ascribed to the low solubility of KMnO4 in alkylamines and the increased sensitivity of alkylamines towards oxidation in comparison with ammonia
6-Quinazolinesulfonyl derivatives and process for preparation thereof
申请人:Asahi Kasei Kogyo Kabushiki Kaisha
公开号:EP0046572A2
公开(公告)日:1982-03-03
A 6-quinazolinesulfonyl derivative of Formula (I):
wherein
R1 is a hydrogen atom or a C1-12 alkyl group:
R2 is a hydrogen atom, a C1-12 alkyl group, a C4-10 cycloalkyl group, an aryl group or an aralkyl group; and
R1 and R2 may be linked directly or through an oxygen atom to form a 5- to 7-membered heterocyclic ring together with the adjacent nitrogen atom; and
R3 is a
group wherein R is a C1-8 alkyl group; a -NH(CH2)nNH2 group wherein n is an integer of 2 to 10; or a
group; and the pharmaceutically acceptable salts thereof; and a process for the preparation thereof. The compounds of this invention have a relaxatory action for vascular smooth muscle and are useful as a vasodilator and a hypotensor.
flash vacuum thermolysis (FVT) with Ar matrix isolation of the product. Matrixphotolysis of 16 affords diazo compound 15, cyclic ketenimine 19 and open‐chain ketenimine 26. 2‐Quinoxalinylcarbene 17 was also formed in the matrixphotolysis and identified by its ESR spectrum. FVT of either 22 or 15/16 afforded 4‐quinolylnitrene, identified by its Ar‐matrix ESR spectrum. A second nitrene ESR signal obtained
通过电子自旋共振(ESR)和红外(IR)光谱鉴定,4-喹啉基叠氮化物22的基质光解可得到4-喹啉基硝烯21。还观察到分配给叠氮苯23(1741 cm -1)的次要吸收。进一步的光解作用会在1902和1909 cm -1处归因于环状酮亚胺19,而在2044 cm -1处归因于开链酮亚胺26且在1982 cm -1处具有较弱的吸收,归因于开环腈。25。2-(5-四唑基)喹喔啉14和三唑并[1,5- a对喹喔啉16在2084 cm -1处产生吸收,这是由于重氮化合物15在温和的快速真空热解(FVT)中形成,并带有Ar基质分离产物。16的基质光解得到重氮化合物15,环状酮亚胺19和开链酮亚胺26。2-喹喔啉基卡宾17也在基质光解中形成,并通过其ESR光谱进行鉴定。FVT为22或15/16时,可以得到4-喹啉基亚硝烯,由Ar-矩阵ESR光谱确定。在两个FVT和光解实验中从这22个中获得的第二个氮烯E