定向的邻金属化用于将硼官能团引入N,N-二异丙基苯甲酰胺中,从而导致硼酸酯和硼酸酯衍生物的形成。Ñ,Ñ -Diisopropylbenzamide邻-硼酸频哪醇酯可以与硼氢化钠-的TMSCl导致减小Ñ,Ñ -diisopropylbenzylamino邻-硼酸。该化合物的X射线晶体学分析和11 B NMR清楚地表明,受阻的异丙基氨基基团足以阻止B–N分子内配位,这与N,N-二甲基苄基氨基形成对比原硼酸。
定向的邻金属化用于将硼官能团引入N,N-二异丙基苯甲酰胺中,从而导致硼酸酯和硼酸酯衍生物的形成。Ñ,Ñ -Diisopropylbenzamide邻-硼酸频哪醇酯可以与硼氢化钠-的TMSCl导致减小Ñ,Ñ -diisopropylbenzylamino邻-硼酸。该化合物的X射线晶体学分析和11 B NMR清楚地表明,受阻的异丙基氨基基团足以阻止B–N分子内配位,这与N,N-二甲基苄基氨基形成对比原硼酸。
aliphatic substrates for selective C(sp3)–H bond borylations. Heterocyclic molecules are selectively borylated using the inherently elevated reactivity of the C–H bonds. A number of late-stage C–H functionalization have been described using the same catalysts. Furthermore, we show that one of the catalysts could be used even in open air for the C(sp2)–H and C(sp3)–Hborylations enabling the method more general
A new concept for the meta‐selective borylation of aromatic amides is described. It has been demonstrated that while esters gave para borylations, amides lead to meta borylations. For achieving high meta selectivity, an L‐shaped bifunctional ligand has been employed and engages in an O⋅⋅⋅K noncovalent interaction with the oxygen atom of the moderately distorted amide carbonyl group. This interaction
Synthesis and structure of potential Lewis acid–Lewis base bifunctional catalysts: 2-N,N-Diisopropylaminophenylboronate derivatives
作者:Samuel W. Coghlan、Richard L. Giles、Judith A.K. Howard、Leonard G.F. Patrick、Michael R. Probert、Gillian E. Smith、Andrew Whiting
DOI:10.1016/j.jorganchem.2005.07.108
日期:2005.11
Directed ortho-metallation is used to introduce a boron function into N,N-diisopropylbenzamide, resulting in the formation of both borinate and boronate derivatives. N,N-Diisopropylbenzamide ortho-boronate pinacol ester can be reduced with sodium borohydride–TMSCl resulting in N,N-diisopropylbenzylamino ortho-boronic acid. X-ray crystallography and 11B NMR of this compound clearly shows that the hindered
定向的邻金属化用于将硼官能团引入N,N-二异丙基苯甲酰胺中,从而导致硼酸酯和硼酸酯衍生物的形成。Ñ,Ñ -Diisopropylbenzamide邻-硼酸频哪醇酯可以与硼氢化钠-的TMSCl导致减小Ñ,Ñ -diisopropylbenzylamino邻-硼酸。该化合物的X射线晶体学分析和11 B NMR清楚地表明,受阻的异丙基氨基基团足以阻止B–N分子内配位,这与N,N-二甲基苄基氨基形成对比原硼酸。