Unusual formation of tetrahydro-1-isoquinolones from tetrahydroisoquinoline-1-carboxylic acids with carbodiimides and mechanistic aspects
作者:Masami Kawase
DOI:10.1039/c39900001328
日期:——
The reaction of tetrahydroisoquinoline-1-carboxylic acids with carbodiimides leads to the formation of tetrahydro-1-isoquinolones in high yields, involving a reaction between mesoionic 1,3-oxazol-5-one intermediates and molecular oxygen.
A synthetically useful catalytic system for aliphatic C–H oxidation with a nonheme cobalt complex and m-CPBA
作者:Xiang Wen、Yidong Ma、Jie Chen、Bin Wang
DOI:10.1039/d4ob00807c
日期:——
We report herein a synthetically useful catalytic system for aliphatic C–H oxidation with a mononuclear nonheme cobalt(II) complex and m-chloroperbenzoic acid (m-CPBA). Preliminary mechanistic studies suggest that a high-valent cobalt–oxygen species (e.g., cobalt(IV)-oxo or cobalt(III)-oxyl) is the oxidant that effects C–H oxidation via a rate-determining hydrogen atom abstraction (HAA) step.
我们在此报告了一种用于脂肪族 C-H 氧化的合成有用的催化系统,该系统使用单核非血红素钴 ( II ) 络合物和间氯过苯甲酸 ( m -CPBA)。初步机理研究表明,高价钴-氧物种(例如,钴( IV )-氧代或钴( III )-氧基)是通过决定速率的氢原子夺取(HAA)影响C-H氧化的氧化剂步。
KAWASE, MASAMI, J. CHEM. SOC. CHEM. COMMUN.,(1990) N9, C. 1325-1329