Copper-Catalyzed C-N, C-O Coupling Reaction of Arylglyoxylic Acids with Isatins
作者:Rashmi Prakash、Sanjib Gogoi
DOI:10.1002/adsc.201600516
日期:2016.10.6
The copper(II)‐catalyzed decarboxylative couplingreactions of arylglyoxylic acids with isatins afford 4H‐benzo[d][1,3]oxazin‐4‐ones via decarbonylation and concurrent C–N, C–O bond formation.
芳基乙醛酸与Isatin的铜(II)催化的脱羧偶联反应通过脱羰作用和同时的C–N,C–O键形成提供4 H-苯并[ d ] [1,3]恶嗪-4-酮。
<i>o</i>-Acetoxylation of oxo-benzoxazines <i>via</i> C–H activation by palladium(<scp>ii</scp>)/aluminium oxide
Direct activation of sp2 C–H bonds by a palladium catalyst has received significant attention in organic chemistry. However, most of these C–Hactivation reactions are carried out in hazardous solvents. Herein we report a novel solvent-free direct sp2 C–Hbond functionalization (oxygenation) method using Pd(II)/Al2O3 catalysis of oxo-benzoxazine derivatives with good to excellent yields, and demonstrate
钯催化剂直接活化sp 2 C-H键在有机化学中受到了广泛关注。然而,大多数这些 C-H 活化反应是在危险溶剂中进行的。在此,我们报道了一种使用 Pd( II )/Al 2 O 3催化氧代苯并恶嗪衍生物的新型无溶剂直接 sp 2 C-H 键官能化(氧化)方法,并证明了其在合成药学上重要的化合物。