A microwave improvement in the synthesis of the quinazoline scaffold
摘要:
A rapid and efficient microwave-assisted protocol is described that greatly improves a recent synthetic method developed for quinazoline synthesis. The synthetic protocol is based on the use of cycles of microwave irradiation. The optimization process is reported and the experimental results are compared with those of the conventional synthetic route. (c) 2007 Elsevier Ltd. All rights reserved.
I<sub>2</sub>-Catalyzed Aerobic Oxidative C(sp<sup>3</sup>)–H Amination/C–N Cleavage of Tertiary Amine: Synthesis of Quinazolines and Quinazolinones
作者:Yizhe Yan、Ying Xu、Bin Niu、Huifang Xie、Yanqi Liu
DOI:10.1021/acs.joc.5b00474
日期:2015.6.5
An iodine-catalyzedoxidative C(sp3)–H amination/C–N cleavage of tertiaryamines couducted under an oxygen atmosphere has been developed and affords a route to quinazolines and quinazolinones in good to excellent yields via a domino ring annulation. The method is metal-free, peroxide-free, and operationally simple to implement with a wide scope of substrates and represents a new avenue for multiple
A new synthetic pathway to quinazolines is described. This new method uses hexamethylenetetramine in TFA and potassium ferricyanide in aqueous ethanolic KOH, starting fromsimple N-protected anilines. The method affords substituted quinazolines with high selectivities and good yields, reducing reaction-time and work-up operations.
Selective Iodine-Catalyzed Intermolecular Oxidative Amination of C(sp3)H Bonds with ortho-Carbonyl-Substituted Anilines to Give Quinazolines
作者:Yizhe Yan、Yonghui Zhang、Chengtao Feng、Zhenggen Zha、Zhiyong Wang
DOI:10.1002/anie.201203880
日期:2012.8.6
The selectiveamination of C(sp3)Hbonds adjacent to nitrogen or oxygen atoms of N‐alkylamides, ethers, or alcohols with ortho‐carbonyl‐substituted anilines constitutes the first step in a tandem annulation that leads to quinazolines in good to excellent yields (see scheme; NIS=N‐Iodosuccinimide, TBHP=tert‐butyl hydroperoxide). The selectivity of the amination of primary and secondary CHbonds is
Substituted triazoles and pharmaceutical compositions containing the compounds are disclosed as being useful in inhibiting the activity of the receptor protein tyrosine kinase Axl. Methods of using the compounds in treating diseases or conditions associated with Axl activity are also disclosed.