作者:Yulian M. Volovenko、Anton V. Tverdokhlebov、Alexandr P. Gorulya、Svetlana V. Shishkina、Roman I. Zubatyuk、Oleg V. Shishkin
DOI:10.1002/1099-0690(200202)2002:4<663::aid-ejoc663>3.0.co;2-a
日期:2002.2
seemed to have a critical influence on the nature of the products obtained. Thus, compounds 11d−h with sterically hindered nitrogen atoms gave the pyrrolines 25−50 mentioned above, while unhindered derivatives 11a−c afforded products of intramolecular alkylation, namely the 3-cyano-2-oxo-1,2-dihydropyrrolo[1,2-a]benzazoles 51−53. An X-ray diffraction study of 2-amino-3-(2-benzothiazolyl)-1-(p-nitroben
许多1-酰氨基-2-氨基-3-杂芳基-4-氧代-2-吡咯啉13 - 50通过治疗的4-氯-2-杂芳基-3- oxobutanenitriles制备11A - ħ与取代的苯甲酸和2- DMF中110-120°C的呋喃甲酸酰肼。当在三乙胺存在下偶联相同的试剂时,观察到反应过程对氯腈11a - h的性质有明确的依赖性。氯腈11中杂环氮原子的空间排列似乎对所得产物的性质具有关键影响。因此,化合物11d - h与空间位阻的氮原子得到的吡咯啉25 - 50如上所述,而不受阻碍衍生物11A - Ç得到分子内烷基化的产物,即3-氰基-2-氧代-1,2-二氢吡咯并[1,2一]氮茚51 − 53。的2-氨基-3-(2-苯并噻唑基)-1-(X射线衍射研究p -nitrobenzoylamino)-4-氧代-2-吡咯啉(24)进行,以确认化合物的结构13 - 50无歧义地。尝试将该反应扩展为对甲苯磺酰肼导致简单的