A combined experimental and density functional study of 1-(arylsulfonyl)-2-<i>R</i>-4-chloro-2-butenes reactivity towards the allylic chlorine
作者:Sergey V. Bondarchuk、Victor V. Smalius、Boris F. Minaev
DOI:10.1002/poc.3425
日期:2015.6
1‐(arylsulfonyl)‐2‐R‐4‐chloro‐2‐butenes are studied both experimentally and theoretically. The developed synthetic procedures are characterized by a general rapidity, cheapness, and simplicity providing moderate to high yields of 1‐arylsulfonyl 1,3‐butadienes (48–95%), 1‐(arylsulfonyl)‐2‐R‐4‐(N,N‐dialkylamino)‐2‐butenes (31–53%), 1‐(arylsulfonyl)‐2‐R‐2‐buten‐4‐ols (37–61%), and bis[4‐(arylsulfonyl)‐3‐R‐but‐2‐enyl]sulfides
通过实验和理论研究了许多环取代的1-(芳基磺酰基)-2 - R --4-氯-2-丁烯的亲核取代和脱氯化氢反应。发达的合成方法具有快速,廉价和简便的特点,可提供中等至高收率的1-芳基磺酰基1,3-丁二烯(48-95%),1-(芳基磺酰基)-2- R--4 - N,N-二烷基氨基)-2-丁烯(31-53%),1-(芳基磺酰基)-2- R --2-丁烯-4-醇(37-61%)和双[4-(芳基磺酰基)-3 ‐ R[2-丁烯]硫化物(40-70%)。丙酮中的中间烯丙基阳离子的密度泛函理论B3LYP / 6-311 ++ G(2d,2p)计算表明,它们的高稳定性源于SO 2 Ar基团的共振稳定和超共轭作用。在二烯/烯丙基部分的键临界点估计的反应性参数 与哈米特(σp)具有高度相关性(R 2 > 0.97))常量。1-芳基磺酰基1,3-丁二烯的特征在于部分破坏的π共轭体系,这是根据对两个中心的离域化(δ