To determine kTTA the measurements from Figure (and Figure atmosphere. After adding diisopropylamine (36 mL) to the solution, the mixture was heated to 100 °C. Subsequently, triisopropylsilylacetylene (3.52 g, 19.3 mmol) was added dropwise and the resulting solution was stirred at 100 °C overnight. After cooling to room temperature, THF and diisopropylamine were removed under reduced pressure. The residue was extracted with CHCl3, dried over Na2SO4, filtered, and dried under reduced pressure. The crude product was purified by column chromatography (n-hexane) followed by recrystallization from methanol to give TIPS-Naph (69% yield) with ≈99.9% optical purity. Three further consecutive recrystallisation steps was employed to yield TIPS-Naph with an optical purity of ≈99.99% following the discovery of a fluorescent contamination.