The solvent was removed with a glass syringe and the lithium was washed with dry THF (2 × 2 mL). Once a clean lithium was obtained, THF (2 mL, 0.5 M with respect to the chlorosilane) was added, and ...

The crude solid was purified over silica gel chromatography (DCM/MeOH 0–25%) to obtain the desired product 1 (113 mg, 0.13 mmol,17%). Compound 1 was added to a solution of 2 (140 mg, 0.12 mmol, 1 ...