Regio- and Chemoselective Metalation of Chloropyrimidine Derivatives with TMPMgCl⋅LiCl and TMP<sub>2</sub>Zn⋅2 MgCl<sub>2</sub>⋅2 LiCl
作者:Marc Mosrin、Paul Knochel
DOI:10.1002/chem.200801831
日期:2009.1.26
Efficient zincation and magnesiation of chlorinated pyrimidines can be performed at convenient temperatures (e.g., 25 and 55 °C) by using TMPMgCl⋅LiCl and TMP2Zn⋅2 MgCl2⋅2 LiCl (TMP=2,2,6,6‐tetramethylpiperidyl) as effective bases. Quenching of the resulting zincated or magnesiated pyrimidines with various electrophiles furnishes highly functionalized pyrimidines in 51–93 % yield. Oxidative aminations
高效浸锌和氯化嘧啶的镁化可以在方便的温度下(例如,25和55℃),通过使用TMPMgCl⋅LiCl和TMP进行2 Zn⋅2 中号GCL 2 ⋅2的LiCl(TMP = 2,2,6,6-四甲基哌啶基)作为有效碱。用各种亲电试剂对所得的锌化或镁化的嘧啶进行淬灭,可提供高度官能化的嘧啶,收率为51-93%。进行氧化胺化,从而导致胺化嘧啶。通过使用这种方法,我们还制备了与药物相关的吡唑并嘧啶和杀真菌剂Mepanipyrim。