作者:Ramulu Akula、Yan Xiong、Hasim Ibrahim
DOI:10.1039/c3ra41376d
日期:——
Electrophilic α-cyanation of activated methylene compounds was achieved under mild basic conditions using commercially available TsCN as a CN+ equivalent. A series of 1,3-dicarbonyl compounds, both cyclic and acyclic, were found to be suitable substrates for this transformation. Subjecting 1,1,1-trifluoro-1,3-dicarbonyl compounds to a modified procedure resulted in the formation of α-cyano ketones
使用市售的TsCN作为CN +等效物,在温和的碱性条件下实现了活化亚甲基化合物的亲电α-氰化。发现一系列环状和非环状的1,3-二羰基化合物是该转化的合适底物。使1,1,1-三氟-1,3-二羰基化合物经过改进的程序导致三氟乙酰基断裂后形成α-氰基酮。还开发了一种有效的一锅氰化/吡唑从1,3-二酮生成4-氰基吡唑的顺序。