Ahmad Masarwa, Alois Fürstner and Ilan Marek
Chem. Commun., 2009, 5760-5762
DOI:
10.1039/B910465H,
Communication
Pd(II)- and Pt(II)-catalyzed ring-expansion of enantiomerically pure alkylidenecyclopropane derivatives leads to the formation of cyclobutene species with a complete preservation of the stereogenic center.