1: With di-isopropyl azodicarboxylate; triphenylphosphine in tetrahydrofuran T=20°C; Mitsunobu reaction; 2: With tetrabutyl ammonium fluoride in tetrahydrofuran T=20°C;
Cournoyer, Richard Leo; Keitz, Paul Francis; Lowrie Jr., Lee Edwin; Muehldorf, Alexander Victor; O'Yang, Counde; Yasuda, Dennis Mitsugu
Patent: US2001/56100 A1, 2001 ;
US 20010056100 A1
