727652-67-7

Upstream product

• 52947-05-4 [α-13C]benzoyl chloride 
• 14630-40-1 Bis(trimethylsilyl)ethyne 
• 3880-99-7 1-(13C)benzoic acid 

Downstream Products

• 1108747-52-9 ([3-⁽¹³⁾C]-4,4-dibromo-3-phenylbut-3-en-1-yn-1-yl)trimethylsilane 
• 1395857-98-3 [1,8-di⁽¹³⁾C]-1,8-diphenylocta-1,3,5,7-tetrayne 
• 1395858-00-0 [1,7-di⁽¹³⁾C]-1,8-diphenylocta-1,3,5,7-tetrayne 
• 1395858-02-2 [2,7-di⁽¹³⁾C]-1,8-diphenylocta-1,3,5,7-tetrayne 

Relevant academic research and scientific papers

Synthesis and 13C NMR spectroscopy of 13C-labeled α,ω-diphenylpolyynes

The synthesis of three 13C-labeled α,ω- diphenylpolyynes is described. The known positions of the labeled carbon atoms allow assignment of the resonances in the 13C NMR spectra and identification of trends in the chemical shifts. Geo

Mechanistic aspects of alkyne migration in alkylidene carbenoid rearrangements

(Chemical Equation Presented) The mechanism of the Fritsch-Buttenberg- Wiechell rearrangement of 13C labeled precursors has been examined to determine the propensity of the alkynyl (R-C=C-) group to migrate in an alkylidene carbenoid species. R