1,3-Dichloro-1,1,2,2,3,3-hexa-tert-butyltristannane: Thermolysis involving trapping of stannylene, Bu2Sn: and reactivity with various nucleophiles
作者:Hemant K. Sharma、Alejandro Metta-Magaña、Keith H. Pannell
DOI:10.1016/j.ica.2017.03.045
日期:2018.4
The bifunctional 1,3-dichloro-tristannane (ClBu2Sn)-Bu-t-(SnBu2)-Bu-t-(SnBu2Cl)-Bu-t, 1, has been investigated with respect to thermolysis and nucleophilic substitution. Thermolysis of 1 leads to slow elimination of the stannylene which may be trapped by elemental sulphur, PhSSPh and 2,3-dimethylbutadiene. Reactions of 1 with the silyllithium reagent PhMe2SiLi, lead to new group 14 catenanes PhMe2Si-(SnBu2)-Bu-t-(Bu2Sn)-Bu-t-(SnBu2)-Bu-t-Cl, 9, and PhMe2Si-(SnBu2)-Bu-t-(Bu2Sn)-Bu-t-(SnBu2)-Bu-t-(SnBu2)-Bu-t-SiPhMe2, 10. Both 9 and 10 have been characterized by single crystal X-ray diffraction. Overall the new chemistry illustrates the significance of (Bu2Sn)-Bu-t: during such reactions, either loss or addition! (C) 2017 Published by Elsevier B.V.