在无金属和无化学氧化剂的条件下开发了一种高效的电化学双C(sp 3 )–H胺化反应。可以高产率得到一系列咪唑并[1,5- a ]喹唑啉-5( 4H )-酮和5-氧代-4,5-二氢咪唑并[1,5- a ]喹唑啉-3-甲腈。可以借助该方法来调节产品分布。考察了反应机理并研究了相应的中间体。该反应具有底物范围广、产物分布可控、条件温和、制备规模化等特点。
Iodine promoted dual oxidative C(sp<sup>3</sup>)–H amination of 2-methyl-3-arylquinazolin-4(3<i>H</i>)-ones: a facile route to 1,4-diarylimidazo[1,5-<i>a</i>]quinazolin-5(4<i>H</i>)-ones
作者:Kavitha Donthiboina、Hari Krishna Namballa、Siddiq Pasha Shaik、Jagadeesh Babu Nanubolu、Nagula Shankaraiah、Ahmed Kamal
DOI:10.1039/c7ob02677c
日期:——
of benzylamines and 2-methylquinazolin-4-(3H)-ones was developed to yield imidazo[1,5-a]quinazolin-5(4H)-ones via dual C(sp3)–H amination under metal free conditions in a greener way using molecular oxygen as a terminal oxidant. This tandem transformation provides an efficient approach to construct various functionalized imidazo[1,5-a]quinazolin-5(4H)-ones in a straightforward manner via a sequential