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An efficient tandem elimination-cyclization-desulfitative arylation of 2-(gem-dibromovinyl)phenols(thiophenols) with sodium arylsulfinates has been developed. In the presence of TBAF-PdCl2-Cu(OAc)2-NEt 3, the reactions generated 2-arylbenzofurans(thiophenes) with good yields in one-pot under ligand-free conditions. The Royal Society of Chemistry 2013.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 5394-13-8 is helpful to your research. Electric Literature of 5394-13-8
Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem