Highly Regio- and Stereoselective Synthesis of (1Z,3E)-2-sulfonyl-3-stannyl-1,3-dienes by hydrostannylation of (Z)-2-sulfonyl-1,3-enynes
摘要:
The Stille coupling of (E)-alpha-stannylvinyl sulfones with alkynyl bromides in DMF in the presence of Pd(PPh3)(4) and CuI gave (Z)-2-sulfonyl-1,3-enynes in good yields. (Z)-2-Sulfonyl-1,3-enynes underwent palladium-catalysed hydrostannylation with tributyltin hydride to afford highly regio- and stereoselectively (1Z,3E)-2-sulfonyl-3-stannyl-1,3-dienes.
Stereoselective synthesis of functionalized (1E,5E)-1,5-dien-3-ynes containing ester or sulfonyl groups by palladium-catalyzed addition and cross-coupling reactions
作者:Wenyan Hao、Shiyun Xie、Yichao Wu、Mingzhong Cai
DOI:10.1039/c4nj00087k
日期:——
Stereoselective synthesis of (1E,5E)-1-sulfonyl (or ethoxycarbonyl)-substituted 1,5-dien-3-ynes has been described.
(1E,5E)-1-磺酰基(或乙氧羰基)取代的1,5-二烯-3-炔的立体选择性合成已经被描述。
Stereoselective Synthesis of Difunctionalized 1,3-Dienes Containing Tin and Sulfonyl Groups by Palladium-Catalyzed Regio- and Stereocontrolled Addition Reactions
作者:Hong Zhao、Weisen Yang、Shiyun Xie、Mingzhong Cai
DOI:10.1002/ejoc.201101153
日期:2012.2
Using palladium-catalyzed addition reactions, a terminal alkyne, an acetylenic sulfone, and a tin hydride comprise the building blocks for the construction of difunctionalized 1,3-dienes containing tin and sulfonyl groups in an atom-economical fashion. Terminal alkynes 1 undergo clean cis addition to acetylenic sulfones 2 in the presence of catalytic amounts of palladium acetate and tri(2,6-dimethoxyphenyl)phosphane