Efficient and green syntheses of heterocycles are of great importance. In this work, we have demonstrated the synthesis of benzo[d]thiazoles and benzo[d]oxazoles using 2-acylpyridazin-3(2H)-ones as acyl transfer agents under transition-metal-free and eco-friendly conditions. It is worthy to note that the reaction is efficient, green, and economical, and will find several applications in organic synthesis, medicinal chemistry, and industrial chemistry. (C) 2013 Elsevier Ltd. All rights reserved.
Carmellino; Massolini; Pagani, Il Farmaco, 1993, vol. 48, # 10, p. 1427 - 1438
作者:Carmellino、Massolini、Pagani、Zani、Leri
DOI:——
日期:——
2-Acylpyridazin-3-ones: Novel Mild and Chemoselective Acylating Agents for Amines
2-Acyl-4,5-dichloropyridazin-3-ones served as excellent novel N-acylating reagents for amines under neutral conditions in organic solvent. They are convenient, chemoselective and easy to handle stable N-acylating reagentsof amines.
Facile Synthesis of Symmetric and Unsymmetric 1,3,4-Oxadiazoles Using 2-Acyl(or aroyl)pyridazin-3-ones
作者:Yong-Jin Yoon、Yong-Dae Park、Jeum-Jong Kim、Hyun-A Chung、Deok-Heon Kweon、Su-Dong Cho、Sang-Gyeong Lee
DOI:10.1055/s-2003-37647
日期:——
Symmetric and unsymmetric 1,3,4-oxadiazoles were synthesized in situ from hydrazine hydrate and the corresponding 2-acyl-4,5-dichloropyridazin-3-ones as acylating agents in polyphosphoric acid or BF 3 OEt 2 in excellent yields.