(2R,4S)-3-((R)-cyclopentyl(1-methyl-1H-imidazol-2-yl)methyl)-4-isopropyl-2-methoxyoxazolidine; N,N-diisopropylethylamine hydrochloride; N-ethyl-N,N-diisopropylamine in tetrahydrofuran T=20°C; 24 h; Inert atmosphere;

1H-imidazole in pyridine

tin(ll) chloride in N,N-dimethyl-formamide T=0°C; 1 h;