Reactions of 1,2-di(2-thienyl)-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene

Reactions of a sterically protected 1,2-di(2-thienyl)-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobutene were investigated. The diphosphinidenecyclobutene reacted with elemental sulfur or transition metal reagents to form a thiaphosphirane derivative or the corresponding transition metal complexes, respectively. Reactions of the di(2-thienyl)diphosphinidenecyclobutene with butyllithium followed by treatment with electrophiles afforded functionalized di(2-thienyl)diphosphinidenecyclobutene derivatives.

Graphical abstractA sterically protected 1,2-di(2-thienyl)-3,4-bis[(2,4,6-tri-t-butylphenyl)phosphinidene] cyclobutene reacted with elemental sulfur or transition metal reagents to form thiaphosphirane derivative or the corresponding transition metal complexes, respectively. Reactions of the diphosphinidenecyclobutene with butyllithium followed by treatment with electrophiles afforded functionalized diphosphinidenecyclobutene derivatives.Figure optionsDownload full-size imageDownload as PowerPoint slide