The addition reaction of lithiumreagents to the 4 position of 2‐chloropyrimidine or 2‐chloroquinazoline followed by oxidation of the resultant dihydro intermediate product is a powerful tool for the synthesis of 4‐substituted 2‐chloropyrimidines or 2‐chloroquinazolines. 4‐Vinyl derivatives undergo a conjugate nucleophilic addition across the vinyl group. A nucleophilic displacement of chloride in
A “Catch–React–Release” Method for the Flow Synthesis of 2-Aminopyrimidines and Preparation of the Imatinib Base
作者:Richard J. Ingham、Elena Riva、Nikzad Nikbin、Ian R. Baxendale、Steven V. Ley
DOI:10.1021/ol301673q
日期:2012.8.3
The development of a monolith-supported synthetic procedure is reported, taking advantage of flow processing and the superior flow characteristics of monolithic reagents over gel-phase beads, to allow facile access to an important family of 2-aminopyrimidine derivatives. The process has been successfully applied to a key precursor on route to Imatinib (Ar = 3-pyridyl, R-1 = 2-methyl-5-nitrobenzyl, R-2 = H).