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.
Stereoselective addition of sodium organyl chalcogenolates to alkynylphosphonates: synthesis of diethyl 2-(organyl)-2-(organochalcogenyl)vinylphosphonates
作者:Antonio L Braga、Elenilson F Alves、Claudio C Silveira、Leandro H de Andrade
DOI:10.1016/s0040-4039(99)02044-4
日期:2000.1
Organyl thiolate, selenolate or tellurolate anions reacted with alkynylphosphonates 1 to give diethyl 2-(organyl)-2-(organochalcogenyl)vinylphosphonates [β-organochalcogenyl vinylphosphonates] 2 in satisfactory yields. The reaction was stereoselective, giving predominantly or exclusively the (Z)-stereoisomer.
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.
Stereospecific formation of enynephosphonates via palladium-catalyzed cross-coupling reaction of β-organotelluro vinylphosphonates with alkynes
作者:Antonio L Braga、Leandro H de Andrade、Claudio C Silveira、Angélica V Moro、Gilson Zeni
DOI:10.1016/s0040-4039(01)01867-6
日期:2001.12
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.