Stereospecific formation of enynephosphonates via palladium-catalyzed cross-coupling reaction of β-organotelluro vinylphosphonates with alkynes
摘要:
beta -Organotelluro vinylphosphonates 1 undergo direct coupling reaction with terminal alkynes in the presence of PdCl2/CuI in methanol at room temperature to give enynephosphonates 3 with retention of configuration in good yields. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis and reaction of β-organyltelluro vinylphosphonates and vinyl sulfones
作者:Won Bum Jang、Dong Young Oh、Chi-Wan Lee
DOI:10.1016/s0040-4039(00)00782-6
日期:2000.6
Reactions of organyl tellurols generated in situ from ditellurides and alkynes bearing electron-stabilizing groups such as the phosphonyl and sulfonyl groups gave the beta-organyltelluro vinylphosphonates or vinyl sulfones in high yield, which are followed by transmetallation by organometallic reagents. (C) 2000 Elsevier Science Ltd. All rights reserved.