Synthesis and preliminary evaluation of 2-substituted-1,3-benzoxazole and 3-[(3-substituted)propyl]-1,3-benzoxazol-2(3H)-one derivatives as potent anticancer agents
作者:M. S. R. Murty、Kesur R. Ram、Rayudu Venkateswara Rao、J. S. Yadav、Janapala Venkateswara Rao、Vino T. Cheriyan、Ruby John Anto
DOI:10.1007/s00044-010-9353-y
日期:2011.6
The synthesis and cytotoxic activity studies of a new series of cyclic amine containing benzoxazole and benzoxazolone derivatives are described. The 2-cyclic amine-1,3-benzoxazoles 5a–k, 5-chloro-3-(3-chloropropyl)-1,3-benzoxazol-2(3H)-one 8 and 3-[3-(cyclic amino)propyl]-1,3-benzoxazol-2(3H)-ones 9a–f were synthesized. The newly synthesized compounds with the influence of the presence of cyclic amine
Going to the source: Formamides or parentamines were used as an aminogroupsource for the silver‐mediated amination of benzoxazoles. Although reactions with formamides proceeded at high temperatures, the directamination with amines took place under much milder conditions (see scheme). Optically active aminogroups could also be installed without racemization.
A segmented flow platform for on-demand medicinal chemistry and compound synthesis in oscillating droplets
作者:Ye-Jin Hwang、Connor W. Coley、Milad Abolhasani、Andreas L. Marzinzik、Guido Koch、Carsten Spanka、Hansjoerg Lehmann、Klavs F. Jensen
DOI:10.1039/c7cc03584e
日期:——
We report an automated flow chemistry platform that can efficiently perform a wide range of chemistries, including single/multi-phase and single/multi-step, with a reaction volume of just 14 μL. The breadth of compatible chemistries is successfully demonstrated and the desired products are characterized, isolated, and collected online by preparative HPLC/MS/ELSD.
我们报告了一个自动化的流动化学平台,该平台可以有效地执行各种化学反应,包括单相/多相和单步/多步,反应体积仅为14μL。通过制备型HPLC / MS / ELSD成功地证明了兼容化学的广度,并在线表征,分离和收集了所需的产品。
The Synthesis of 2-Aminobenzoxazoles Using Reusable Ionic Liquid as a Green Catalyst under Mild Conditions
作者:Ya Zhou、Zhiqing Liu、Tingting Yuan、Jianbin Huang、Chenjiang Liu
DOI:10.3390/molecules22040576
日期:——
A facile, green, and efficient method for the direct oxidative amination of benzoxazoles using heterocyclic ionic liquid as catalyst has been developed. The reaction proceeded smoothly at room temperature and gave the desirable 2-aminobenzoxazoles with good to excellent yields (up to 97%). The catalyst 1-butylpyridinium iodide can be easily recycled and reused with similar efficacies for at least four cycles.
Copper(<scp>ii</scp>) ions supported on functionalized graphene oxide: an organometallic nanocatalyst for oxidative amination of azoles <i>via</i> C–H/C–N bond activation
Graphene oxide (GO) was chemically modified with para-aminobenzoic acid (PABA) to immobilize copper(II) ions on its surface and used as a nanocatalyst for the oxidative C(sp2)–H bond amination reaction. A practical method to prepare Cu2+ supported on para-aminobenzoic acid grafted on GO was reported. The prepared Cu2+@GO/PABA was characterized by FT-IR, XRD, SEM, AFM, TEM, UV-Vis, and ICP techniques