1: 65 percent / dicyclohexylcarbodiimide / tetrahydrofuran / 1.) 0 deg C, 2 h, 2.) room temperature, 17.0 h 2: 1.) 1-hydroxybenzotriale, N-methylmorpholine, 2.) hydrogen / 1.) palladium black / 1.) DMF, water, room temperature, 20 h, 2.) DMF. methanol, 1.0 h View Scheme

1: 65 percent / dicyclohexylcarbodiimide / tetrahydrofuran / 1.) 0 deg C, 2 h, 2.) room temperature, 17.0 h 2: 1.) 1-hydroxybenzotriale, N-methylmorpholine, 2.) hydrogen / 1.) palladium black / 1.) DMF, water, room temperature, 20 h, 2.) DMF. methanol, 1.0 h View Scheme