Microwave-Promoted Tin-Free Iminyl Radical Cyclization with TEMPO Trapping: A Practical Synthesis of 2-Acylpyrroles
摘要:
Microwave-promoted iminyl radical cyclizations can be terminated by trapping with TEMPO, affording functionalized adducts. The use of alkynes as radical acceptors delivers a range of 2-acylpyrroles in good yields. Toxic and hazardous reagents, which are frequently employed in radical reactions, are not required. The O-phenyl oxime ether substrates are constructed in a single step from readily available ketones.
Rapid 1,4-Alkynylation of Acyclic
Enones Using K[F<sub>3</sub>BCCR]
作者:Simon Woodward、Ferruccio Bertolini
DOI:10.1055/s-0028-1087481
日期:——
Conjugate alkynylation of acyclic enones using sp-hybridised potassium organotrifluoroborates in the presence of BF3ËOEt2 is rapidly attained. The simplicity of the processes is suitable for the preparation of small compound libraries.