1: With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride in dichloromethane T=20°C; 0.5 h; 2: With sodium tetrahydroborate; water in tetrahydrofuran T=0°C; 0.5 h;
Baldwin, Jack E.; Farthing, Christopher N.; Russell, Andrew T.; Schofield, Christopher J.; Spivey, Alan C.
Tetrahedron Letters, 1996 , vol. 37, # 21 p. 3761 - 3764