Preparation of Quinazolines via a 2+2+2 Annulation from Aryldiazonium Salts and Nitriles
作者:Mani Ramanathan、Shiuh-Tzung Liu
DOI:10.1021/acs.joc.7b01325
日期:2017.8.4
A (2+2+2) modular synthesis of multisubstituted quinazolines has been realized by the direct reaction of aryldiazonium salts with two equivalent of nitriles. Reaction of aryldiazonium salt with a nitrile provides the initial formation of a reactive nitrilium ion, which is attacked by another molecule of nitrile followed by electrophilic cyclization to deliver the desired product. Notable flexibility
Csp<sup>2</sup>-O and C-C Bond Formation via Pd-Catalyzed Coupling Reaction of 2,4-Dichloroquinazoline
作者:Alka Sharma、Vijay Luxami、Kamaldeep Paul
DOI:10.1002/jhet.2330
日期:2016.1
An efficient palladium‐catalyzed C–O and subsequent C–Cbondformation of 2,4‐dichloroquinazoline have been described. The designed strategy results in the synthesis of novel 2‐arylated quinazolin‐4‐ones framework with various aryl/heteroaryl boronic acids in moderate to good yields along with 2,4‐diarylated quinazolines. This methodology offers a direct transformation of aryl halides to aryl alcohols/ketone