The Tetraethylphosphorodiamidate (<i>O</i>P(O)(NEt<sub>2</sub>)<sub>2</sub>) Directed Metalation Group (DMG). Directed <i>ortho</i> and Lateral Metalation and the Phospha Anionic Fries Rearrangement
作者:Manlio Alessi、Jignesh J. Patel、Kristina Zumbansen、Victor Snieckus
DOI:10.1021/acs.orglett.0c00094
日期:2020.3.20
(-OP(O)(NEt2)2) group as an effective directed metalation group (DMG). Lithiation-electrophile quench of 1 provides a general synthesis of ortho-substituted aryl and naphthyl phosphorodiamidates 4-8. We also describe the phospha anionic ortho-Fries (AoF) rearrangement of the phosphorodiamidates 1a,1b → 2 or 3 and its vinylogous counterpart to the ortho-tolyl phosphorodiamidates 5b → 13. Intermolecular competition
我们报告四乙基磷酸二氨基甲酸酯(-OP(O)(NEt2)2)组作为有效的定向金属化基团(DMG)。1的锂化-亲电猝灭提供了邻位取代的芳基和萘基二氨基磷酸二氨基酯4-8的一般合成。我们还描述了磷二酰胺1a,1b→2或3的磷酰基阴离子邻-弗里斯(AoF)重排及其与邻甲苯基磷二酰胺5b→13的乙烯基类似物。分子间竞争实验表明-OP的DMG强度大致相等(O)(NEt2)2和功能最强大的OCONEt2组。