Lithium diselenide in aprotic medium - a convenient reagent for synthesis of organic diselenides
作者:Ludwik Syper、Jacek Mlochowski
DOI:10.1016/s0040-4020(01)89801-x
日期:1988.1
The reduction of selenium with lithium in THF in the presence of diphenylacetylene as a catalyst afforded lithium diselenide, which reacted with electrophiles giving alkyl or aryl diselenides 1 - 3 and selenides 4, as by-products. The useful method for preparation of diselenides based on this reaction was elaborated.
Copper-Catalyzed One-Pot Synthesis of Imidazo/Benzoimidazoquinazolinones by Sequential Ullmann-Type Coupling and Intramolecular CH Amidation
作者:Hao Xu、Hua Fu
DOI:10.1002/chem.201102794
日期:2012.1.23
A simple, practical, and highly efficient copper‐catalyzed one‐pot synthesis of imidazo/benzoimidazoquinazolinones has been developed. The procedure is based on a sequential copper‐catalyzed Ullmann‐type N‐arylation and aerobic oxidative intramolecular CH amidation. This method should provide a new and useful strategy for construction of N‐heterocycles.
Syntheses of indolo[1,2-<i>a</i>]quinazolinone derivatives <i>via</i> palladium catalyzed intramolecular C–H amidation
作者:Trimurtulu Kotipalli、Veerababurao Kavala、Donala Janreddy、Chun-Wei Kuo、Ting-Shen Kuo、Hsiu-Ni Huang、Chiu-Hui He、Ching-Fa Yao
DOI:10.1039/c3ra44798g
日期:——
2-a]quinazolinone starting from 2-iodobenzamide and indole derivatives is reported. In this two-step procedure, indole is N-arylated with 2-iodobenzamide derivatives via Ullman coupling, followed by an intramolecular C–H amidation using a palladium catalyst.
据报道从2-碘苯甲酰胺和吲哚衍生物开始合成吲哚并[1,2- a ]喹唑啉酮。在此两步过程中,通过Ullman偶联将吲哚与2-碘联苯甲酰胺衍生物进行N-芳基化,然后使用钯催化剂进行分子内CH酰胺化。
Copper-catalyzed N-arylation and aerobic oxidation: one-pot synthesis of tetrahydroisoquinolino[2,1-a]quinazolinone derivatives
作者:Hua Tian、Hongwei Qiao、Changjin Zhu、Hua Fu
DOI:10.1039/c3ra44975k
日期:——
An efficient and practical copper-catalyzed one-pot method for synthesis of tetrahydroisoquinolino[2,1-a]quinazolinone derivatives has been developed, and the corresponding target products were prepared in moderate to good yields. The one-pot approach underwent sequential copper-catalyzed N-arylation, intramolecular aerobic oxidative cyclization, and the newly synthesized products provided diverse structures for screening of biological molecules.