The iron-catalyzed Suzuki–Miyaura cross-coupling of secondary propargyl electrophiles with lithium organoborates has been established. A propyl-bridged bulky bisphosphine ligand, SciPROP-TB, cooperated with the bulky TIPS substituent at the alkyne terminal position to achieve the cross-coupling reaction with exclusive propargylic selectivity. The reaction features high functional group compatibility
Stereoselective access to substituted enediyne building blocks
作者:George Hynd、Graham B. Jones、Gary W. Plourde、Justin M. Wright
DOI:10.1016/s0040-4039(99)00813-8
日期:1999.6
Intermolecular coupling-elimination of disubstituted propargyl bromides gives rise to differentially substituted 3-hexen-1,5-diynes with E:Z selectivity as high as 100:1. Application of the methodology in the synthesis of key nanomaterial building blocks is demonstrated. (C) 1999 Elsevier Science Ltd. All rights reserved.