Copper catalyzed oxidative deamination of Betti bases: an efficient approach for benzoylation/formylation of naphthols and phenols
作者:Mohit L. Deb、Choitanya Dev Pegu、Paran J. Borpatra、Pranjal K. Baruah
DOI:10.1039/c6ra04567g
日期:——
A copper-catalyzed benzoylation/formylation of naphthols and phenols via oxidativedeamination of Betti bases.
通过Betti碱的氧化脱氨作用,铜催化的萘酚和苯酚的苯甲酰化/甲酰化。
Catalyst-free multi-component cascade C–H-functionalization in water using molecular oxygen: an approach to 1,3-oxazines
作者:Mohit L. Deb、Choitanya D. Pegu、Paran J. Borpatra、Prakash J. Saikia、Pranjal K. Baruah
DOI:10.1039/c7gc01494e
日期:——
Synthesis of 1,3-oxazinesviacatalyst free C–H functionalization using molecular oxygen in water.
在水中使用分子氧进行无催化剂的C-H官能化合成1,3-噁唑啉。
Metal-free intramolecular α-sp3 C–H oxygenation of tert-amine: An efficient approach to 1,3-oxazines
作者:Mohit L. Deb、Choitanya Dev Pegu、Paran J. Borpatra、Pranjal K. Baruah
DOI:10.1016/j.tetlet.2016.10.086
日期:2016.12
iodine-tert-butylhydroperoxide promoted intramolecular sp3 C–H oxygenation α- to tertiary amine for the synthesis of 1,3-oxazines. The reaction is metal-free, atom economic, high yielding and proceeds within a short time under heating at 130 °C in DMF solvent. A variety of Betti bases of naphthol and phenol having cyclic as well as acyclic tert-amine moieties are employed as the starting materials. The Betti
在这里,我们公开了碘-叔丁基过氧化氢促进分子内sp 3 C–H氧化α-生成叔胺,用于合成1,3-恶嗪。该反应是无金属的,原子经济的,高产率的,并且在DMF溶剂中在130℃加热下在短时间内进行。各种萘酚的贝提碱和具有环状苯酚以及非环状叔-胺部分被用作起始原料。萘酚的Betti碱可产生单一的恶嗪非对映异构体,而酚Betti碱可提供非对映体混合物。机理研究表明,涉及“ I + ”作为活性催化物质的非自由基途径。该方法在数克规模的反应上具有优异的产率。
Iodine/Hydrogen Peroxide Promoted Intramolecular Oxidative C–O Bond Formation in Ethanol at Room Temperature: A Green Approach to 1,3-Oxazines
reaction of a variety of 1-(aminoalkyl)-2-naphthols or 2-(aminoalkyl)phenols to give the corresponding 1,3-oxazines was developed. The reaction is simple, atom-economic, and proceeds smoothly at roomtemperature under metal-free conditions in ethanol as solvent.
deconstructive annulation methodology. Sequential oxidative C(sp3)–O/C(sp3)–N cleavage followed by intramolecular/intermolecular annulationreaction was carried out under aerobic reaction conditions. Mechanistic analyses performed on the substrate revealed that the C(sp3)–O bond cleavage supersedes the C(sp3)–N bond scission. The in situ generated Betti base intermediate through the C(sp3)–O cleavage