Transnitrilation from Dimethylmalononitrile to Aryl Grignard and Lithium Reagents: A Practical Method for Aryl Nitrile Synthesis
作者:Jonathan T. Reeves、Christian A. Malapit、Frederic G. Buono、Kanwar P. Sidhu、Maurice A. Marsini、C. Avery Sader、Keith R. Fandrick、Carl A. Busacca、Chris H. Senanayake
DOI:10.1021/jacs.5b06136
日期:2015.7.29
An electrophilic cyanation of aryl Grignard or lithium reagents, generated in situ from the corresponding aryl bromides or iodides, by a transnitrilation with dimethylmalononitrile (DMMN) was developed. DMMN is a commercially available, bench-stable solid. The transnitrilation with DMMN avoids the use of toxic reagents and transition metals and occurs under mild reaction conditions, even for extremely
Direct C–H Radiocyanation of Arenes via Organic Photoredox Catalysis
作者:Wei Chen、Xuedan Wu、Joshua B. McManus、Gerald T. Bida、Kang-Po Li、Zhanhong Wu、David A. Nicewicz、Zibo Li
DOI:10.1021/acs.orglett.2c03940
日期:2022.12.23
Innovative labeling methods to incorporate the short-lived positron emitter carbon-11(11C) into bioactive molecules are attractive for positron emission tomography (PET) tracer discovery. Herein, we report a direct C–H radiocyanation method that incorporates [11C]cyanide (11CN–) to a series of functional electron-rich arenes via photoredox catalysis. This photoredox-mediated radiocyanation can proceed