Pd(0)-catalyzed addition of Me<sub>3</sub>SnSnMe<sub>3</sub> to α,β-alkynic aldehydes and ketones. Synthesis of (<i>Z</i>)-β-trimethylstannyl α,β-alkenic aldehydes and ketones. Preparation and synthetic uses of substituted (<i>Z</i>)-4-trimethylstannyl-1,3-butadienes
作者:Edward Piers、Richard D. Tillyer
DOI:10.1139/v96-234
日期:1996.11.1
Treatment (dry tetrahydrofuran, reflux) of the α,β-alkynic aldehydes 26–28 and ketones 29–36 with Me3SnSnMe3 in the presence of a catalytic amount of (Ph3P)4Pd provides fair to excellent yields of the corresponding (Z)-β-trimethylstannyl α,β-alkenic aldehydes 41–43 and ketones 44–51. The carbonyl compounds 41–51, upon reaction with methylenetriphenylphosphorane under suitable conditions, are smoothly
在催化量的 (Ph3P)4Pd 存在下,用 Me3SnSnMe3 处理(干燥四氢呋喃,回流)α,β-炔醛 26-28 和酮 29-36 提供了相当到极好的相应 (Z)-β 产率-三甲基甲锡烷基 α,β-烯醛 41-43 和酮 44-51。羰基化合物 41-51 在适当条件下与亚甲基三苯基正膦反应后,分别顺利转化为 (Z)-4-三甲基甲锡烷基-1,3-丁二烯 61-71。用膦酰基乙酸三甲酯的阴离子处理醛 41 和用膦酰基乙酸酯 73 的阴离子处理醛 42 分别产生极好的 5-三甲基甲锡烷基-2,4-庚二烯酸酯 72 和 74 的产率。(Z)-4-三甲基甲锡烷基-1,3-丁二烯的合成潜力通过将 62 转化为功能化的、