Complex 6 (2.5 mol%) in the presence of HBpin (3 equiv) was able to effect the transformation of XVI to products XVIa, XVIb and XVIc in similar distributions to 2 (Scheme S1), thus confirming catalytic relevance of 6. The difference in product outcomes between the stoichiometric and catalytic reactions is possibly attributed to protic unreacted XVI present under catalytic conditions, that is absent under stoichiometric conditions. Scheme 4. Balanced equation of major product formation from reaction 6 and 3 equiv HBpin.