Sequential Oxidative Fragmentation and Skeletal Rearrangement of Peroxides for the Synthesis of Quinazolinone Derivatives
作者:Akash S. Ubale、Moseen A. Shaikh、Boopathy Gnanaprakasam
DOI:10.1021/acs.joc.1c00889
日期:2021.7.16
For the first time, the sequential reaction of peroxyoxindole that involves base-promoted oxidative fragmentation to isocyanate formation and primary amine or amino alcohol accelerated skeletal rearrangement to synthesize exo-olefinic-substituted quinazolinone or oxazoloquinazolinone is reported. The advantages of this new reaction include a broad substrate scope and transition-metal-free and room-temperature
Catalytic Asymmetric Synthesis of Inherently Chiral Saddle‐Shaped Dibenzo[b,f][1,5]diazocines†
作者:Jinmiao Zhou、Mengyao Tang、Xiaoyu Yang
DOI:10.1002/cjoc.202400243
日期:2024.9
Dibenzo[b,f][1,5]diazocines are a class of eight-membered heterocycles, which exhibit unique rigid saddle-shaped structure and possess inherent chirality. In this study, we report a convenient and straightforward method for the catalytic enantioselective synthesis of these unique chiral molecules through chiral phosphoric acid-catalyzed dimerization of 2-acylbenzoisocyanates. Notably, the addition
二苯并[ b , f ][1,5]二氮杂辛是一类八元杂环化合物,具有独特的刚性鞍状结构并具有固有的手性。在这项研究中,我们报告了一种方便、直接的方法,通过手性磷酸催化 2-酰基苯并异氰酸酯的二聚,催化对映选择性合成这些独特的手性分子。值得注意的是,添加相应的2-酰基苯胺作为助催化剂显着提高了这些反应的效率,并且简单的相分离操作导致产物具有优异的对映体纯度。进行实验研究是为了阐明这些反应背后的机制,并根据研究结果提出合理的反应机制。
Isocyanate aus Isothiocyanaten durch Oxidation mit Palladium(II)-chlorid und Luftsauerstoff
作者:Spyridon M. Paraskewas、Andreas A. Danopoulos
DOI:10.1055/s-1983-30455
日期:——
KATRITZKY, A. R.;GRZESKOWIAK, N. E.;ALAJARIN-CERON, M.;BAHARI, ZAKARIA, B+, J. CHEM. RES. MICROFICHE, 1982, N 8, 208-209
作者:KATRITZKY, A. R.、GRZESKOWIAK, N. E.、ALAJARIN-CERON, M.、BAHARI, ZAKARIA, B+
DOI:——
日期:——
PARASKEWAS, S. M.;DANOPOULOS, A. A., SYNTHESIS, BRD, 1983, N 8, 638-640