On triazoles XLIII. Synthesis of 1,2,4-triazolyl isoquinolinium zwitter ions
作者:Ibolya Prauda、István Kövesdi、PÉTer Trinka、JÓZsef Reiter
DOI:10.1002/jhet.5570380215
日期:2001.3
Type 8 isoquinolinium zwitter ions were synthesised by the reaction of type 1 diketones or type 2 pyrylium salts with different 5-amino-3-Q-1H-1,2,4-triazoles. Spectroscopic and X-ray diffraction evidence was given for the zwitter ion structure of the products obtained. The position of the negative charge on the 1,2,4-tiazolium ring was proved by comparison of the cmr and uv spectra of the products
键入8异喹啉鎓两性离子通过型的反应,合成1酮类或键入2具有不同的5-氨基-3- Q-1吡喃鎓盐ħ -1,2,4-三唑。给出了所得产物的两性离子结构的光谱和X射线衍射证据。通过比较为此目的制备的三种可能的N-苄基衍生物14-16获得的产物的cmr和uv光谱,证明了1,2,4-噻唑环上的负电荷位置。
One-pot Synthesis of 2,3-Benzodiazepines from Arynes and β-Diketones
作者:Kentaro Okuma、Yukiko Tanabe、Ryoichi Itoyama、Noriyoshi Nagahora、Kosei Shioji
DOI:10.1246/cl.130580
日期:2013.10.5
Novel one-pot synthesis of 2,3-benzodiazepines from aryne precursors was accomplished. Tofisopam, well-known anxiolytics, could be synthesized via C–C bond insertion of 4,5-dimethoxybenzyne with 2-ethyl-1-(3,4-dimethoxyphenyl)butane-1,3-dione, followed by the reaction with hydrazine hydrate in a one-pot operation. This protocol is applicable to the synthesis of other biologically active 2,3-benzodiazepines, such as Girisopam and Nerisopam.
成功实现了一锅合成2,3-苯二氮杂烯的小说方法。著名的抗焦虑药托非索潘可以通过4,5-二甲氧基苯乙炔与2-乙基-1-(3,4-二甲氧基苯基)丁烷-1,3-二酮的C–C键插入反应,随后在一锅反应中与水合肼反应来合成。该方法适用于其他生物活性2,3-苯二氮杂烯的合成,如吉利索潘和尼利索潘。
On triazoles XLIX. Synthesis of 5,6-dihydrothiazolo[3,2-<i>b</i>]-[1,2,4]triazol-2-yl-, 6,7-dihydro-5<i>H</i>-[1,2,4]triazolo[5,1-<i>b</i>][1,3]thiazin-2-yl-, and 5,6,7,8-tetrahydro[1,2,4]triazolo[5,1-<i>b</i>] [1,3]thiazepin-2-yl-isoquinolinium salts
作者:Ibolya Prauda、József Reiter
DOI:10.1002/jhet.5570400612
日期:2003.11
5′-Mercapto-1′H-1,2,4-triazol-3′-yl-isoquinolinium salts (6) were synthesised by the reaction of ortho-acyl phenylacetones (2) or the corresponding pyrylium salts (3) and 5-amino-2,3-dihydro-1H-1,2,4-triazole-3-thione (5). Treatment of thioles 6 withα,ω-dibromoalkanes led to type 15, 16 and 17 isoquinolinium salts condensed with thiazole, thiazine and thiazepine rings. When 6 are reacted with dibromomethane
5'-巯基-1' ħ -1,2,4-三唑-3'-基-异喹啉盐(6)由反应合成邻-酰基phenylacetones (2)或相应的吡喃鎓盐(3)和5 -氨基-2,3-二氢-1 H -1,2,4-三唑-3-硫酮(5)。用α,ω-二溴代烷烃处理硫醇6导致与噻唑,噻嗪和噻氮平环缩合的15、16和17型异喹啉鎓盐。当6与二溴甲烷(10)反应时,获得11型二聚结构。