A metal-free protocol of direct C(sp3)–H cyanation with cyanobenziodoxolones functioning as both cyanating reagents and oxidants was developed. Unactivated substrates, such as alkanes, ethers and tertiary amines, were thereby transformed to the corresponding nitriles in moderate to high yields. Mechanistic studies indicated that the cyanation proceeded with two potential pathways, which is highly dependent
A Widely Applicable Regioselective Aerobic α-Cyanation of Tertiary Amines Heterogeneously Catalyzed by Manganese Oxides
作者:Kazuya Yamaguchi、Ye Wang、Noritaka Mizuno
DOI:10.1002/cctc.201300477
日期:2013.10
A fit catalyst for some aerobic exercise: A manganese oxide‐based octahedral molecular sieve, OMS‐2, could act as an efficient heterogeneous catalyst for the regioselective α‐cyanation of various tertiaryamines, including trialkyl, benzylic, and N,N‐dialkylaniline derivatives using trimethylsilyl cyanide (TMSCN) as the cyano source and molecular oxygen as the terminal oxidant.
Copper-catalyzed synthesis of α-amino nitriles through methyl transfer from DMF to aromatic amines
作者:Zaifeng Yuan、Na Li、Chunyu Zhu、Chengfeng Xia
DOI:10.1039/c8cc00485d
日期:——
A copper-catalyzed activation of C(sp3)–H bonds of DMF at room temperature was developed, which results in methyl transfer to aromatic amines for efficient synthesis of exceedingly valuable α-amino nitriles. This process features excellent functional group tolerance, a broad substrate scope, and high activity under ambient conditions.
Iron catalyzed oxidative cyanation of tertiary amines
作者:Wei Han、Armin R. Ofial
DOI:10.1039/b910548d
日期:——
Iron(ii) and iron(iii) salts catalyze the oxidative alpha-cyanation of tertiaryamines by trimethylsilyl cyanide in the presence of tert-butylhydroperoxide under acid-free conditions at room temperature.
Potassium Thiocyanate as Source of Cyanide for the Oxidative α-Cyanation of Tertiary Amines
作者:Alexander Wagner、Armin R. Ofial
DOI:10.1021/jo502846c
日期:2015.3.6
Oxidation at the sulfur of the safe-to-handle potassium thiocyanate releases cyanide units that are trapped in the presence of co-oxidized tertiaryamines to form α-amino nitriles. These cyanations work in aqueous solutions and do not require a catalyst, nor do they form toxic byproducts.