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(E)-α-锡基烯基砜的合成及其在高选择性合成反应中的应用
The Synthesis of (E)-α-Stannylvinyl Sulfones and Their Applications in High Selective Synthetic Reactions
【作者】 陈桂琴;
【导师】 蔡明中;
【作者基本信息】 江西师范大学 , 有机化学, 2007, 硕士
【摘要】 摘要:本论文工作首先探讨了炔基砜的钯催化锡氢化反应,发现该反应是高区域选择性和立体选择性的,提供了合成新型1,1-双官能团试剂——(E)-α-锡基烯基砜,继而研究了他们在高选择性合成反应中的应用。通过钯络合物催化下炔基砜的锡氢化反应立体选择性地合成了1,1-双官能团试剂——(E)-α-锡基烯基砜。利用(E)-α-锡基烯基砜分子中锡基团和砜基团的性质差别,研究了在钯络合物催化下(E)-α-锡基烯基砜与烯基卤化物的交叉偶联反应,提供了立体选择合成2-芳砜基取代的1,3-二烯的新方法;在Pd(PPh3)4/CuI催化下,研究了(E)-α-锡基烯基砜和芳基碘的交叉偶联反应,提供了合成(Z)-1,2-双取代的烯基砜的新方法;研究了(E)-α-锡基烯基砜与炔基溴的偶联反应,提供了立体选择性地合成2-芳砜基取代的1,3-烯炔的新方法;研究了(E)-α-锡基烯基砜与烯丙基溴的偶联反应,提供了立体选择性地合成了2-芳砜基取代的1,4-二烯烃的新方法。我们还研究炔基砜与三丁基锡化氢以及和烯基卤化物或烯丙基溴之间的锡氢化-Stille串联反应,提供了一锅法合成2-芳砜基取代的1,3-二烯和2-芳砜基取代的1,4-二烯烃的实用方法。
【Abstract】 This dissertation describles the stereoselective synthesis of 1,1-difunctional group reagents---- (E)-α- stannylvinyl sulfones and their applications in high selective synthetic reactions.The palladium-catalyzed hydrostannylation of acetylenic sulfones with tributyltin hydride gives versatile (E)-α-stannylvinyl sulfones which are new difunctional group reagents. Based on the reactivityes difference of tributylstannyl and sulfonyl groups, we carried out the cross-coupling reaction of (E)-α-stannylvinyl sulfones with alkenyl halides in the presence of Pd(PPh3)4/CuI, to afford the correponding 1,3-dienyl sulfones in high yields. We studied on the reactions of (E)-α-stannylvinyl sulfones with aryl iodide in the presence of Pd(PPh3)4/CuI, to afford the corresponding (Z)-1,2- disubstituted alkenylsulfones in high yields. We carried out the cross-coupling reaction of (E)-α-stannylvinyl sulfones with acetylenic bromides in the presence of Pd(PPh3)4/CuI, to afford the corresponding 1,3-enynylsulfones in high yields. (E)-α-Stannylvinyl sulfones underwent palladium-catalyzed coupling reaction with allylic bromides to give 1,4-dienylsulfones in good yields. We also investigated the tandem hydrostannylation-stille reaction of acetylenic sulfones with tributyltin hydride and alkenyl halides or allylic bromides , providing one pot stereoselective synthesis of 1,3-dienylsulfones or 1,4-dienylsulfones.
- 【网络出版投稿人】 江西师范大学 【网络出版年期】2007年 04期
- 【分类号】O621.251;O643.32
- 【下载频次】69