A series of 2-arylamino-l-azaazulenes were synthesized by the Buchwald-Hartwig cross coupling reaction. The resulting compounds were characterized by H-1 NMR, C-13 NMR, HRMS analyses, and elemental analysis. X-Ray crystallographic analysis revealed that 2-(1-naphthylamino)-1-azaazuleneexists in dimeric form with two intermolecular N-H center dot center dot center dot N hydrogen bonds in its crystal structure.
使用Sonogashira-Hagihara交叉偶联反应,然后用浓磷酸脱羧,合成了两种化合物6-(1-(氮杂氮烯-2-基)乙炔基氮杂烯(8)和6-(2-氮杂烯基)乙炔基氮杂烯(10)。化合物8和10的特征在于1 H和13 C核磁共振(NMR)光谱,质谱,紫外可见(UV-Vis)光谱,循环伏安法和密度泛函理论(DFT)计算。根据该结果,证实两种化合物在其整个分子结构中均具有π共轭。化合物8和10的酸响应度使用UV-Vis和1 H NMR光谱进行了评估。发现化合物8对三氟乙酸高度敏感,其1-氮杂氮烯基部分充当碱。当与过量的三氟乙酸混合时,化合物10产生z阳离子。
Various azaazulene derivatives were synthesized and their antiallergic activity was examined. The structure-activity relationship among various derivatives modified by introducing substituents at the 1-,2-, or 3-position of the azaazulene ring was investigated. The inhibitory activities on allergic histamine release of the compounds bearing a 5-tetrazolyl group at the 3-position were more potent than
Reactions of diethyl azulene-1,3-dicarboxylate derivatives and 1-azaazulene derivatives with Grignard reagents, and alkyl- and aryllithium
作者:Tadayoshi Morita、Noritaka Abe、Kahei Takase
DOI:10.1039/b003078n
日期:——
Reactions of diethyl azulene-1,3-dicarboxylate (1) and diethyl 2-chloroazulene-1,3-dicarboxylate (11) with Grignard reagents, followed by dehydration with tetrachloro-1,2-benzoquinone, gave 2-, 4,- and 6-substituted addition–oxidation products. Grignards reagents have a tendency to react with 1 at the positions in the order of 2 > 4 > 6, while steric hindrance has a greater influence at the positions in order of 2 > 4 > 6. Reactions of 1 and 11 with phenyllithium and methyllithium gave similar results. On the other hand, on the reaction of diethyl 2-methoxyazulene-1,3-dicarboxylate (15), Grignard reagents attacked preferentially at the methoxy group, and 2-substituted products were obtained. Use of excess molar equivalents of Grignard reagents led to diaryl-substituted products. Reaction of 2-chloro-1-azaazulenes with Grignard reagents also gave similar addition–oxidation products, and reacted at the positions in the order 8 ≫ 4 > 6, whereas reaction of 2-methoxy-1-azaazulene with a Grignard reagent gave 1-azaazulen-2(1H)-one.
Disclosed herein are 1,2-dihydro-2-oxo(or 2-thioxo)cyclohepta[b]-pyrrole-1-acetic acid derivatives having optional substitution at positions 3, on the cycloheptatriene ring and on the acetic acid side chain. The compounds are aldose reductase inhibitors and thus are useful for treating diabetic complications.
Studies on Heterocyclic Analogs of Azulene. VIII. Reaction of 2-Alkoxycyclohepta[6]pyrroles with Dimethyl Acetylenedicarboxylate
作者:Noritaka Abe、Tarozaemon Nishiwaki
DOI:10.1246/bcsj.54.1277
日期:1981.4
2-Alkoxycyclohepta[b] pyrroles reacted with dimethylacetylenedicarboxylate to give tetramethyl 2-alkoxy-3H-2a-azacyclopenta[ef]heptalene-3,4,5,6-tetracarboxylates in benzene and dialkyl 2-(2-alkoxycyclohepta[b]pyrrol-1-yl)fumarate in alcoholic solvents.
The palladium catalyzed heteroarylamination of ethyl 2-chloro-1-azaazulene-3-carboxylate was achieved using a catalyst based on Pd-2(dba)(3) / Xantphos system. Treatment of ethyl 2-(heteroarylamino)-1-azaazulene-3-carboxylates with a PPA-POCl3 mixture gave corresponding annulation products. 2-(2-Benzothiazolylamino)-1-azaazulene (3h) showed anticancer activity against HeLa S3 cells (IC50: 6.5 mu M).