Regioselective Radical Arene Amination for the Concise Synthesis of ortho-Phenylenediamines.
Regioselective Radical Arene Amination for the Concise Synthesis of ortho-Phenylenediamines.
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DOI:
10.1021/jacs.1c05531
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发表时间:
2021-06-30
影响因子:
15
通讯作者:
Phipps RJ
中科院分区:
文献类型:
--
作者:
Gillespie JE;Morrill C;Phipps RJ
The formation of arene C–N bonds directly from C–H bonds is of great importance and there has been rapid recent development of methods for achieving this through radical mechanisms, often involving reactive N-centered radicals. A major challenge associated with these advances is that of regiocontrol, with mixtures of regioisomeric products obtained in most protocols, limiting broader utility. We have designed a system that utilizes attractive noncovalent interactions between an anionic substrate and an incoming radical cation in order to guide the latter to the arene ortho position. The anionic substrate takes the form of a sulfamate-protected aniline and telescoped cleavage of the sulfamate group after amination leads directly to ortho-phenylenediamines, key building blocks for a range of medicinally relevant diazoles. Our method can deliver both free amines and monoalkyl amines allowing access to unsymmetrical, selectively monoalkylated benzimidazoles and benzotriazoles. As well as providing concise access to valuable ortho-phenylenediamines, this work demonstrates the potential for utilizing noncovalent interactions to control positional selectivity in radical reactions.
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DOI:
10.1002/anie.201708967
发表时间:
2017-10-16
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Davis HJ;Genov GR;Phipps RJ
通讯作者:
Phipps RJ
影响因子:
1.8
作者:
He, Y;Chen, YZ;Lovely, CJ
通讯作者:
Lovely, CJ
影响因子:
3.6
作者:
CITTERIO, A;GENTILE, A;VENTURA, S
通讯作者:
VENTURA, S
影响因子:
15
作者:
Chattopadhyay B;Dannatt JE;Andujar-De Sanctis IL;Gore KA;Maleczka RE Jr;Singleton DA;Smith MR 3rd
通讯作者:
Smith MR 3rd
影响因子:
5.2
作者:
Li, Qiong;Zhang, Shu-Yu;Chen, Gong
通讯作者:
Chen, Gong