Selective Cleavage of Inert Aryl C–N Bonds in <i>N</i>-Aryl Amides
作者:Zhiguo Zhang、Dan Zheng、Yameng Wan、Guisheng Zhang、Jingjing Bi、Qingfeng Liu、Tongxin Liu、Lei Shi
DOI:10.1021/acs.joc.7b02880
日期:2018.2.2
A highly selective, IBX-promoted reaction has been developed for the oxidative cleavage of inertC(aryl)–N bonds on secondary amides while leaving the C(carbonyl)–N bond unchanged. This metal-free reaction proceeds under mild conditions (HFIP/H2O, 25 °C), providing facile access to various useful primary amides, some of which would be otherwise unattainable using conventional aminolysis and hydrolysis
已经开发出一种高度选择性的IBX促进的反应,用于氧化裂解仲酰胺上的惰性C(芳基)-N键,同时保持C(羰基)-N键不变。这种无金属的反应在温和的条件下(HFIP / H 2 O,25°C)进行,可以轻松获得各种有用的伯酰胺,而使用常规的氨解和水解方法则无法实现其中的某些。
The synthesis of α,α-difluoroacetamides via electrophilic fluorination in the mixed-solvent of water and PEG-400
Under mild conditions, a series of α,α-difluoro-β-ketoamides were synthesized with Selectfluor® as the F+ source in the presence of K2CO3 in the mixed-solvent of water and PEG-400 (VH2O:VPEG-400=3:1), without additional phase-transfer catalyst. By using this approach, most cases examined in this study proceeded in nearly quantitative conversions regardless of the electronic nature of the substituent
在温和条件下,一系列的α,α二氟β酮酰胺用的Selectfluor合成®的F +的K的存在源2 CO 3在水和PEG-400混合溶剂(伏特H2个Ø:伏特聚乙二醇400=3:1个),无需额外的相转移催化剂。通过使用这种方法,大多数情况下,在这项研究中取代形式的电子性质的几乎定量进行转换,无论检查。
Catalyst-free and highly selective electrophilic mono-fluorination of acetoacetamides: facile and efficient preparation of 2-fluoroacetoacetamides in PEG-400
Series of α-mono-fluorinated acetoacetamides were synthesized under mild condition with industrialized Selectfluor as the F+ source in PEG-400. The approach avoided the use of base or metal catalyst, and most of cases proceeded in nearly quantitative conversions regardless of the electronic nature of the diversity substituent.