Regio-and Stereoselective Synthesis of (E)-1-Alkylseleno-1, 4-Pentadienes by Cross-Coupling of Allyl Bromide with Alkyl-selenovinylcoppers from Alkylselenovinyldialkylboranes
作者:De-Yu Yang、Xian Huang
DOI:10.1080/00397919608003839
日期:1996.12
cuprous bromide-methyl sulfide to generate alkylselenovinylcopper intermediates which underwent stereospecific cross-coupling with allylbromide to yield (E)-1-alkylseleno-1, 4-pentadienes 3. The compounds 3 were formed with retention of configuration predetermined from the stereochemistry of the initial alkylselenovinylboranes.
Regio- and Stereoselective Conversion of Terminal Alkylselenoacetylenes into (E)-2-Alkylseleno-1-Vinylic Iodides via Hydroboration-Iodination
作者:De-Yu Yang、Xian Huang
DOI:10.1080/00397919608004786
日期:1996.12
The hydroboration of terminal alkylselenoacetylenes 1 in the presence of 3 mol% of Pd (PPh(3))(4) with catecholborane 2 followed by hydrolysis, undergo a rapid reaction with iodine under the influence of sodium hydroxide at-10 degrees C in THF to afford a novel method for the regio-and stereospecific synthesis of (E)-2-alkylseleno-1-vinyl iodides 4.
A Stereoselective Route to (E)-1-Alkylseleno-1-Alkenes via Hydroboration-Iodination of Terminal Alkylselenoacetylenes with Dicyclohexylborane
作者:De-Yu Yang、Xian Huang
DOI:10.1080/00397919708005022
日期:1997.1
(E)-1-Alkylseleno-1-alkenes 4 have been synthesized with high stereoselectivity by hydroboration-iodination of terminal alkylselenoactylenes with dicyclohexylborane.