888015-57-4Relevant articles and documents
[2+2] Cycloaddition of ketenes with ynamides. A general method for the synthesis of 3-aminocyclobutenone derivatives
Kohnen, Amanda L.,Xiao, Yin Mak,Tin, Yiu Lam,Dunetz, Joshua R.,Danheiser, Rick L.
, p. 3815 - 3822 (2007/10/03)
Ynamides react with ketenes in [2+2] cycloadditions leading to a variety of substituted 3-aminocyclobut-2-en-1-ones. The ynamides employed in these reactions are readily available via the copper-promoted N-alkynylation of carbamates and sulfonamides with