I<sub>2</sub>/CHP-Mediated Oxidative Coupling of 2-Aminobenzamides and Isocyanides: Access to 2-Aminoquinazolinones
作者:Tian-Qi Wei、Pei Xu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1002/ejoc.201600876
日期:2016.11
coupling of 2-aminobenzamides 1 and isocyanides 2 mediated by I2 and cumylhydroperoxide (CHP) leads to the formation of 2-aminoquinazolinones 3 in moderate to excellent yields. This method provides an efficient approach to 2-aminoquinazolinones with high atom economy under metal-free conditions through two C–N bond-formation reactions. The products can be further transformed to give benzo[4,5]imidazo[2
SVETLIK, J., HETEROCYCLES, 1981, 16, N 8, 1281-1285
作者:SVETLIK, J.
DOI:——
日期:——
Sustainable Synthesis of Diverse Privileged Heterocycles by Palladium-Catalyzed Aerobic Oxidative Isocyanide Insertion
作者:Tjøstil Vlaar、Razvan C. Cioc、Pieter Mampuys、Bert U. W. Maes、Romano V. A. Orru、Eelco Ruijter
DOI:10.1002/anie.201207410
日期:2012.12.21
O2 in, H2O out: Various diamines and related bisnucleophiles readily undergo oxidativeisocyanideinsertion with Pd(OAc)2 (1 mol %) as the catalyst and O2 as the terminal oxidant to give a diverse array of medicinally relevant N heterocycles. The utility of this highly sustainable method is demonstrated by a formal synthesis of the antihistamines astemizole and norastemizole.
O 2 in,H 2 O out:各种二胺和相关的双亲核试剂易于经历氧化异氰化物的插入,其中Pd(OAc)2(1 mol%)作为催化剂,O 2作为末端氧化剂,可得到多种与医学相关的N杂环。抗组胺药阿司咪唑和去甲阿司咪唑的正式合成证明了这种高度可持续性方法的实用性。
Preparation of exo- and endocyclic aminoxyl radicals of 2-Amino-substituted quinazolin-4(3H)-ones
作者:Ladislav Omelka、Jan Světlik
DOI:10.1002/mrc.1260331015
日期:1995.10
2‐Amino‐substituted quinazolin‐4(3H)‐ones were oxidized with RO2· radicals and 4‐nitroperoxybenzoic acid. Two types of radical products, i.e. exo‐ and endocyclicaminoxylradicals, were observed. Their differentiation was carried out on the basis of ESR parameters.