在本报告中,我们提出了一种光促进、无金属的苯基叠氮化物转环反应,用于合成 DNA 编码的七元环。该转化是通过针对苯基序的骨架编辑策略与可逆吸附到固体支持物(RASS)策略相结合而有效实现的。现在可以获得多种有价值的 DNA 编码的七元环化合物,包括 DNA 编码的 3H-氮杂卓、氮杂酮和非天然氨基酸。至关重要的是,这种与 DNA 兼容的方案也可用于引入复杂分子,例如 Lorcaserin 和 Betahistine。将容易获得的苯环选择性地转化为高价值的七元环,为构建多样化和类药物的 DNA 编码库提供了一条有前途的途径。
Synthesis of 1,3-Dicarbonyl Azepines via Photoinitiated Reactions of Aryl Azides with Carbon-Based Nucleophiles
作者:Marina A. Giricheva、Ivan G. Vorobiev、Alexey A. Belikov、Georgy K. Fukin、Andrei V. Budruev
DOI:10.1021/acs.joc.4c01177
日期:2024.7.19
A photoinduced one-pot method for the synthesis of azepines by the reaction of aryl azides with 1,3-dicarbonyl compounds under weakly basic conditions is described. This method offers a simple route for the synthesis of 1,3-dicarbonyl-substituted azepines in good to excellent yields and high regioselectivity and was tested on 1,3-dicarbonyl compounds with different acidity levels. The resulting azepines
3H-azepines and related systems. Part 4. Preparation of 3H-azepin-2-ones and 6H-azepino[2,1-b]quinazolin-12-ones by photo-induced ring expansions of aryl azides
作者:Kaddour Lamara、Robert K. Smalley
DOI:10.1016/s0040-4020(01)96138-1
日期:——
Photolysis of a series of p-substituted phenyl azides (p-X-C6H4N3; X = CO2Me, CO2Et, CN, CF3, SO2NH2, CO2CHPh2, COMe, CHO, and NO2) in 1:1 (nu/nu) THF-water solution produces, in the majority of cases, a 5-substituted-3H-azepine-2-one. In a like manner, 3H-azepin-2-one-3-carboxylates can be prepared from 5-substituted-2-azidobenzoates, providing the 5-substituent is electron-withdrawing.3H-Azepin-2-one mono- and di-carboxylic acids, the former in admixture with decarboxylated material, and 6H-azepino[2,1-b]quinazolin-12-ones, are obtained by irradiation of 2-azidobenzoic acid and of 5-azidoisophthalic acid, respectively. The mode of formation of the azepino-quinazolinones is discussed.
Role of Water in the Photochemical Synthesis of Methyl 12-Oxo-6,12-dihydroazepino[2,1-b]quinazoline-8-carboxylates
作者:A. V. Budruev、M. A. Giricheva、D. A. Davydov、A. V. Pokrovskaia、A. L. Pronina