From a cursory glance, one can see that the new BHC synthesis(Sc6 lelf)use far more of the r4eactant atom (highlighted in green; unutilized atom are highlighted in brown)than the boot synthesis (SC6 right). Infact, the BHC synthesis results in 77%atom economy, a significant improvement over the 40% atom economy found in the older boot synthesis(SC6 right)