Palladium-Catalyzed Regiodivergent Substitution of Propargylic Carbonates
作者:Theresa M. Locascio、Jon A. Tunge
DOI:10.1002/chem.201603481
日期:2016.12.12
The palladium(0)‐catalyzed, ligand‐controlled, regioselective addition of diaryl acetonitrile pronucleophiles to propargylic carbonates is reported. Selective formation of either terminal 1,3‐dienyl or propargylated products is proposed to arise from a change in reaction mechanism controlled by the denticity of the coordinating ligand.
5-hexenenitriles via cyano group migration is reported. The cyano group migration is of high chemo-selectivity even in the presence of aryl or heteroaryl groups as competitors. This protocol provides a facile access to a broad scope of CF3-containing compounds with high molecular complexity and functional group diversity. The success of gram-scale reaction and the versatility of products in derivative synthesis
Preparation of a series of new aryl diazinyl ketoximes (7a,b - 12a,b) required as synthetic building blocks is described. Separation of the E/Z-isomers obtained was achieved by means of chromatography, their configuration was assigned using nmr techniques. Moreover, procedures for the synthesis of the starting ketones (1b - 6b) are given.
HERMANN, CHRISTINE K. E.;SACHDEVA, YESH P.;WOLFE, JAMES F., J. HETEROCYCL. CHEM., 24,(1987) N 4, 1061-1065
作者:HERMANN, CHRISTINE K. E.、SACHDEVA, YESH P.、WOLFE, JAMES F.