Synthesis and Reactions of the Novel 6‐ethyl‐4‐hydroxy‐2,5‐dioxo‐5,6‐dihydro‐2
<i>H</i>
‐pyrano[3,2‐
<i>c</i>
]quinoline‐3‐carboxaldehyde
作者:Magdy A. Ibrahim、Hany M. Hassanin
DOI:10.1002/jhet.3440
日期:——
respectively. The reactivity of aldehyde 2 was examined toward some active methylene nitrile, namely, malononitrile, ethyl cyanoacetate, and cyanoacetamide leading to 2‐iminopyrano[2′,3′:4,5]pyrano[3,2‐c]quinolines 10–12, respectively. Also, some novel pyrazolo[4″,3″:5′,6′]pyrano[2′,3′:4,5]pyrano[3,2‐c]quinolines (13, 14) and thiazolo[5″,4″:5′,6′]pyrano[2′,3′:4,5]pyrano[3,2‐c]quinolines (15, 16) were
从Vilsmeier-Haack的甲磺酸甲酰化反应中高效合成了新型的6-乙基-4-羟基--2,5-二氧代5,6-二氢-2 H-吡喃[3,2 - c ]喹啉3-甲醛(2)3-(1-乙基1-4-羟基-2-氧代(1 H)-喹啉-3-基)-3-氧代丙酸(1)。使醛2与一些氮亲核试剂反应,生成各种3 – 7。醛2与水合肼和盐酸羟胺反应,制得吡唑和异恶唑环氧基吡喃[3,2 - c ]喹啉-2,5(6 H)-dione。醛的反应性2检查朝向一些活性亚甲基腈,即,丙二腈,氰基乙酸乙酯,氰基乙酰胺和通向2- iminopyrano [2',3':4,5]吡喃并[3,2- c ^〕喹啉10 - 12, 分别。而且,一些新的吡唑并[4“,3”:5',6']吡喃并[2',3':4,5]吡喃并[3,2- Ç〕喹啉(13,14)和噻唑并[5“, 4“:5',6']吡喃并[2',3':4,5]吡喃并[3,2- ç〕喹啉