1421354-83-7Relevant academic research and scientific papers
Pd-catalysed reactions of alkynes with model distannanes and poly[di-(n-butyl)]stannane
Khan, Aman,Lough, Alan J.,Gossage, Robert A.,Foucher, Daniel A.
, p. 2469 - 2476 (2013)
A reinvestigation of Pd-catalysed alkyne (R′-C≡CH; R′ = H, Ph) insertion chemistry involving R3SnSnR3 (3a: R = Me; 3b: R = n-Bu) was undertaken. Model distannyl ethylenes 4a-b (Me 3SnCHCR′SnMe3) and 5a-b ((n-Bu) 3SnCHCR′Sn(n-Bu)3) were reproduced and further characterized by NMR (119Sn, 13C, 1H) and UV-Vis spectroscopy. In the presence of an excess of phenylacetylene, dimerization-carbostannylation of compound 4b yielded the new conjugated butadiene, (Z,Z)-1,4-bis(trimethylstannyl)-1,4-diphenyl-buta-1,3-diene (9). An X-ray structure determination of 9 reveals a symmetrical double-bond Z confirmation. Compound 9 was further characterized by NMR, UV-Vis spectroscopy, and MS. A DFT analysis of model compounds (4a-b, 5a-b, 9) and the experimental and theoretical λmax values from the UV-Vis spectra were also compared. Acetylene and phenylacetylene Pd-catalysed insertion into the backbone of poly[di-(n-butyl)]stannane 12 resulted in new, modest molecular weight, partially inserted alkene tin polymers (13a-b) that were also characterized by GPC, NMR, UV-Vis spectroscopy and elemental analysis.
