Cu-catalyzed debrominative cyanation of gem-dibromoolefins: a facile access to α,β-unsaturated nitriles
作者:Brij Bhushan Ahuja、Arumugam Sudalai
DOI:10.1039/c5ob00394f
日期:——
of α,β-unsaturated nitriles from easily accessible gem-dibromoolefins has been developed. The method utilized inexpensive reagents such as Cu2O as a catalyst, L-proline as a ligand and NaCN as a cyanide source to afford α,β-unsaturated nitriles in high yields (62–86%). A deuterium exchange study has shown that one of the bromide atoms of gem-dibromoolefins exchanges with cyanide while the other with
Photo-Promoted Decarboxylative Alkylation of <i>α</i>,<i>β</i>-Unsaturated Carboxylic Acids with ICH<sub>2</sub>CN for the Synthesis of <i>β</i>,<i>γ</i>-Unsaturated Nitriles
作者:Chunxiang Pan、Chunhui Yang、Kangkui Li、Keyang Zhang、Yuanbin Zhu、Shiyuan Wu、Yongyun Zhou、Baomin Fan
DOI:10.1021/acs.orglett.1c02585
日期:2021.9.17
An efficient, catalyst/photocatalyst-free, and cost-effective methodology for the decarboxylative alkylation of α,β-unsaturatedcarboxylicacids to synthesize β,γ-unsaturated nitriles has been developed. The reaction proceeded in an environmentally benign atmosphere of blue light-emitting diode irradiation with K2CO3 and water at room temperature. The methodology worked for a wide range of substrates
已开发出一种高效、无催化剂/光催化剂且具有成本效益的方法,用于α , β -不饱和羧酸的脱羧烷基化以合成β , γ -不饱和腈。该反应在室温下用 K 2 CO 3和水在蓝光发光二极管照射的环境友好气氛中进行。该方法适用于多种基材(22 个示例),产率高达 83%。该协议也适用于克级合成。
Catalytic Enantioselective Construction of Chiral γ-Azido Nitriles through Nitrile Group-Promoted Electrophilic Reaction of Alkenes
construction of enantioenriched γ-azido nitriles through the chiral sulfide-catalyzed asymmetric electrophilic thioazidation of allylic nitriles is disclosed. A wide range of electron-deficient and -rich aryl, heterocyclic aryl, and alkyl substituents are suitable on the substrates of allylic nitriles. The regio-, enantio-, and diastereoselectivities of the reactions are excellent. As versatile platform