The conversion of aldehydes and ketones via their 2,4,6-tri-isopropylbenzenesulphonyl hydrazones into nitrites containing one additional carbon atom
作者:Josef Jiricny、Daniel M. Orere、Colin B. Reese
DOI:10.1039/p19800001487
日期:——
2,4,6-Tri-isopropylbenzenesulphonyl hydrazones of aliphatic and alicyclic aldehydes and ketones react readily with potassium cyanide in boiling methanol solution to give the corresponding nitriles (containing one more carbonatom than the original aldehyde or ketone) in satisfactory yields. Under the same conditions, benzaldehyde 2,4,6-tri-isopropylbenzenesulphonyl hydrazone gives phenylacetonitrile
Nickel-Catalyzed Cyanation of Unactivated Alkyl Chlorides or Bromides with Zn(CN)<sub>2</sub>
作者:Aiyou Xia、Xin Xie、Haoyi Chen、Jidong Zhao、Chunli Zhang、Yuanhong Liu
DOI:10.1021/acs.orglett.8b03539
日期:2018.12.7
A nickel-catalyzed cyanation of unactivated secondary alkyl chlorides or bromides using less toxic Zn(CN)2 as the cyanide source has been developed. The reaction features the use of air-stable and inexpensive NiCl2·6H2O or Ni(acac)2 as the precatalysts and offers an efficient synthesis of a broad range of alkyl nitriles. Cyanation of primary alkyl chlorides or bromides was also achieved by reaction
The radical deboronative cyanation of alkyltrifluoroborates with a broad range of functional groups is enabled by visible-light photoredox catalysis.
通过可见光光合还原催化,实现了烷基三氟硼酸酯的基团脱硼氰化反应,适用于具有广泛功能基团的化合物。
Nickel-Catalyzed Cyanation of Unactivated Alkyl Sulfonates with Zn(CN)<sub>2</sub>
作者:Aiyou Xia、Peizhuo Lv、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.0c02722
日期:2020.10.16
Cyanation of unactivated primary and secondaryalkyl mesylates with Zn(CN)2 catalyzed by nickel has been developed. The reaction provides an efficient route for the synthesis of alkyl nitriles with wide substrate scope, good functional group tolerance, and compatibility with heterocyclic compounds. Mechanistic studies indicate that alkyliodide generated in situ serves as the reactive intermediate