81096-69-7Relevant academic research and scientific papers
Cyclobutadiene Intermediates in Cycloaddition Reactions of 1-Alkynyl Sulfones with 1-Alkynylamines
Eisch, John J.,Hallenbeck, Lawrence E.,Lucarelli, Michael A.
, p. 4095 - 4096 (2007/10/02)
The initially formed product from ynamines, such as diethyl(1-propynyl)amine, and 1-alkynyl sulfones is in fact the corresponding cyclobutadiene and not the 2-sulfinyl-4-aminofuran proposed by Himbert.The formation of the cyclobutadiene ring has been established by MS, IR, and 1H NMR data, as well as by chemical trapping experiments.
Cycloadditions of Ynamines with α,β-Unsaturated Sulfones: Approach to Versatile Four-Membered Carbocyclic Intermediates
Eisch, John J.,Galle, James E.,Hallenbeck, Lawrence E.
, p. 1608 - 1610 (2007/10/02)
The interaction of ynamines with various α,β-unsaturated sulfones, such as 1-alkenyl, 1-alkynyl, or 1,3-alkadienyl sulfones, leads to the ready formation of the vicinally amino- and sulfonyl-substituted cyclobuta ring in a regiospecific manner.The resulti
