Condensed thiophen ring systems. Part XIV. Photolysis of azidobenzo[b]thiophens in secondary amines
作者:Brian Iddon、Hans Suschitzky、David S. Taylor
DOI:10.1039/p19740000579
日期:——
Photolysis of 4-azidobenzo[b]thiophen in diethylamine gave a mixture of starting material, 4-aminobenzo[b]thiophen, 4,4′-azobenzo[b]thiophen (5), tar, and a trace of an unidentified compound. In contrast, 5-azidobenzo[b]thiophen gave 4-amino-5-diethylaminobenzo[b]thiophen (6) as the only isolable product. The 4-amino-5-dialkylaminobenzo[b]thiophens (7)–(9) were prepared similarly by photolysis of a
4- azidobenzo [光解b ]噻吩在二乙胺,得到起始材料,4-氨基苯并[的混合物b ]噻吩,4,4'- azobenzo [ b ]噻吩(5),焦油和未鉴定化合物的轨迹。相反,5-叠氮基苯并[ b ]噻吩给出了唯一可分离的产物4-氨基-5-二乙基氨基苯并[ b ]噻吩(6)。4-氨基-5-二烷基氨基苯并[ b ]噻吩(7)-(9)的制备方法是,将5-叠氮基苯并[ b ]噻吩在适当的仲胺中进行光解。讨论了这些产物的形成机理。5-叠氮基苯甲酸乙酯[ b将噻吩-2-羧酸酯在各种其他亲核溶剂中进行光解和热解,得到仅衍生自三重态腈的产物。用甲酸和过氧化氢的混合物将4-氨基-5-二乙基氨基苯并[ b ]噻吩-2-羧酸乙酯转化为3-乙基-2-甲基噻吩并[3,2 - e ]苯并咪唑-7-羧酸乙酯。
Cascade Cross‐Coupling/Spirocyclization/Formal [4+2] Cycloaddition Reactions of 3‐(2‐Isocyanoethyl)Indoles with Aromatic Azides: Access to Polycyclic Spiroindolines Bearing A Pentasubstituted Guanidine Moiety
A rhodium-catalyzed cascade cross-coupling/spirocyclization/formal [4+2] cycloaddition reaction of 3-(2-isocyanoethyl)indoles with aromatic azides is developed, providing a general synthetic protocol to polycyclic spiroindolines bearing a pentasubstituted guanidine moiety with moderate to excellent yields. This transformation is highly effective since one C−C, one C=N, three C−N bonds as well as two
This invention provides novel 5-HT1F agonists of formula
where X, Y, Z,and R are defined in the specification, which are useful for the prevention and treatment of migraine and associated disorders.
本发明提供了新型 5-HT1F 激动剂,其式为
其中 X、Y、Z 和 R 在说明书中定义,可用于预防和治疗偏头痛及相关疾病。
10.1038/s41929-024-01207-3
作者:Qi, Liang-Wen、Rogge, Torben、Houk、Lu, Yixin
DOI:10.1038/s41929-024-01207-3
日期:——
Direct arene C−H functionalization via nucleophilic aromatic substitution remains a challenging task. Here we report an iridium nitrenoid-catalysed arene C−H functionalization strategy, making use of readily available aryl azides as electrophiles to react with different nucleophilicreaction partners. The practicality of this methodology is demonstrated by enantioselective synthesis of chiral 2-amino-2′-hydroxy-1