Unusual reactivity of 3-chloro-1-pentafluorosulfanylpropene in nucleophilic substitution reactions

被引:20
|
作者
Trushkov, IV
Brel, VK [1 ]
机构
[1] Russian Acad Sci, Inst Physiol Act Cpds, Chernogolovka 142432, Russia
[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia
关键词
pentafluorosulfanyl group; nucleophilic substitution; rearrangements;
D O I
10.1016/j.tetlet.2005.05.041
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
Treatment of 3-chloro-1-pentafluorosulfanylprop-1-ene 1 with KCN yielded the product of prototropic rearrangement CICH=CHCH2SF5, whereas reactions with NaN3 and KSCN gave the SN2 products. Ab initio calculations at MP2/6-311++G** level are used to explain the unusual behaviour of cyanide. It was found that proton transfers from both 1 to CN- and from HCN to the anion of 1 are exothermic. In contrast, azide and thiocyanate ions are too weakly basic to deprotonate 1. (c) 2005 Elsevier Ltd. All rights reserved.
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页码:4777 / 4779
页数:3
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