1: With N,N,N',N'-tetramethylguanidine in tetrahydrofuran T=-20 - 0°C; 2 h; 2: With silica gel in chloroform T=20°C; 20 h; Title compound not separated from byproducts;
Dockendorff, Chris; Sahli, Stefan; Olsen, Madeline; Milhau, Ludovic; Lautens, Mark
Journal of the American Chemical Society, 2005 , vol. 127, # 43 p. 15028 - 15029
