在 EtOH-H 2 O 存在下腈与 P 2 Se 5 的反应得到伯硒代羧酸酰胺。这些化合物与 α-卤代酮的环化得到了多种功能化的 1,3-硒唑。使用 P 2 Se 5 还可以方便地合成硒代羧酸二酰胺,该二酰胺被转化为双(硒唑-2-基)烷烃(“双硒唑”)。开发了一种合成硒脲的实用方法。这种有用的小结构单元成功地应用于伯2-氨基-1,3-硒唑的合成。
An efficient and rapid procedure for the synthesis of 2,4-disubstituted-1,3-thiazoles and selenazoles has been described by the reaction of α-bromoketones with thiourea, phenylthiourea and selenourea at ambient temperature in aqueousmediumunder ultrasonic irradiation. Analytically pure products were formed within 10–60 s in excellent yields. The advantageous features of this non-conventional methodology
Sodium fluoride as an efficient catalyst for the synthesis of 2,4-disubstituted-1,3-thiazoles and selenazoles at ambient temperature
作者:Janardhan Banothu、Krishnaiah Vaarla、Rajitha Bavantula、Peter A. Crooks
DOI:10.1016/j.cclet.2013.10.001
日期:2014.1
Abstract Sodium fluoride was found to be a simple, mild and efficient catalyst for the synthesis of 2,4-disubstituted 1,3-thiazoles and selenazoles utilizing phenacyl bromides/3-(2-bromoacetyl)-2 H -chromen-2-one and thiourea/phenylthiourea/selenourea in aqueous methanol at ambient temperature. Analytically pure products are formed within 1–3 min in excellent yields.
A library of thiazoles and selenothiazoles were synthesized via Ir-catalyzed ylide insertion chemistry. This process is a functional group, particularly heterocycle-substituent tolerant. This was applied to the synthesis of fanetizole, an anti-inflammatory drug, and a thiazole-containing drug fragment that binds to the peptidyl-tRNA hydrolase (Pth) in Neisseria gonorrheae bacteria.
通过 Ir 催化叶立德插入化学合成了噻唑和硒代噻唑库。这个过程是一个官能团,特别是杂环取代基的耐受性。该技术被应用于合成抗炎药法奈替唑以及与淋病奈瑟菌细菌中的肽基-tRNA水解酶(Pth)结合的含噻唑药物片段。
Solid-State Synthesis of 1,3-Selenazoles Employing CuPy<sub>2</sub>Cl<sub>2</sub>as a Lewis Acid Catalyst
作者:J. Venu Madhav、B. Suresh Kuarm、B. Rajitha
DOI:10.1080/00397910802162975
日期:2008.9.29
1,3-Selenazoles were Synthesized from 3-bromo acetyl coumarin and selenourea in the presence of CuPy2Cl2 under solvent-free conditions at ambient temperature. The pure products were identified by spectral data.