Treatment by BuLi of dibromocarbene adducts on allenic phosphine oxides leads to alkylidenecyclopropylidene that, in one case, is an exceptional stabilized cyclopropylidene: this carbene is trapped by the corresponding cumulated trienephosphine oxide in a bimolecular process. © 1992.
Santelli-Rouvier, C., & Santelli, M. (1992). Cumulated trienephosphine oxides. Trapping of an alkylidenecyclopropylidene. Tetrahedron Letters, 33(51), 7843–7844. https://doi.org/10.1016/S0040-4039(00)74758-7