Fig. 5

Deprotection of product 5a and 5o. Reaction conditions: 5 (0.1 mmol), KOH (1.0 mmol) in 2.0 mL of EtOH at room temperature. Isolated yield
Deprotection of product 5a and 5o. Reaction conditions: 5 (0.1 mmol), KOH (1.0 mmol) in 2.0 mL of EtOH at room temperature. Isolated yield