... The Journal of Organic ... J. Org. Chem. ... (3S)-3-[(Trityloxy)methyl]pent-4-en-1-ol (6) DIBAL-H (1 M in hexanes, 3.2 mL, 3.2 mmol) was added dropwise to a solution of 4 (497 mg, 1.29 mmol) in dry THF (10 mL) at −55 °C. Complete conversion was reached after 1 h [TLC: R f (4 ...