443889-61-0Relevant academic research and scientific papers
Ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes via a N-sulfonyl-1,2,3-triazole intermediate
Liu, Renhe,Zhang, Min,Winston-Mcpherson, Gabrielle,Tang, Weiping
supporting information, p. 4376 - 4378 (2013/06/05)
Regioselective ring expansion of alkynyl cyclopropanes to highly substituted cyclobutenes was developed. The reaction involves a copper-catalyzed cycloaddition of an alkyne with an arylsulfonyl azide and a silver-catalyzed carbene formation followed by ring expansion of a cyclopropyl carbene intermediate.
