Multi-step reaction with 7 steps
1: potassium carbonate / N,N-dimethyl-formamide / 6 h / 70 °C
2: tetrahydrofuran; ethanol / 6 h / 0 °C / Reflux
3: magnesium bromide / diethyl ether / 2 h / 20 °C
4: 6-chloro-5-phenylpyrimidine-4-(9-O-quinidine) ether; tetra-(n-butyl)ammonium iodide; N,N,N',N'-tetramethyl-1,8-diaminonaphthalene / tetrahydrofuran / 0.5 h / -78 °C
5: potassium tert-butylate / tetrahydrofuran / 2 h / 0 °C
6: triethylamine / dichloromethane / 3 h / 20 °C
7: lithium borohydride / tetrahydrofuran / 0 - 20 °C
With
lithium borohydride; 6-chloro-5-phenylpyrimidine-4-(9-O-quinidine) ether; potassium tert-butylate; tetra-(n-butyl)ammonium iodide; N,N,N',N'-tetramethyl-1,8-diaminonaphthalene; potassium carbonate; triethylamine; magnesium bromide;
In
tetrahydrofuran; diethyl ether; ethanol; dichloromethane; N,N-dimethyl-formamide;
2: Darzens condensation / 4: Feist-Benary interrupted synthesis;
DOI:10.1021/ol201332u