Multi-step reaction with 5 steps
1: 78 percent / diisopropylamine, n-butyllitium / tetrahydrofuran; hexamethylphosphoric acid triamide / 2.5 h / Ambient temperature
2: 42 percent / potassium tert-butoxide, H2O / diethyl ether / 18 h / Ambient temperature
3: 1.) hydroxybenzotriazole, dicyclohexylcarbodiimide / 1.) DMF, 0 deg C, 3 d, 2.) 0 deg C, 2 h; room temperature, 24 h
4: 99 percent / hydrogen / 10percent Pd-C / methanol; H2O / 4 h / 25 °C
5: 1.) N-hydroxynorbornane-exo-2,3-dicarboximide, dicyclohexylcarbodiimide, 2.) 50percent aq. acetic acid / 1.) DMF, room temperature, 16 h, 2.) 25 deg C, 1 h
With
n-butyllithium; potassium tert-butylate; water; hydrogen; benzotriazol-1-ol; acetic acid; diisopropylamine; dicyclohexyl-carbodiimide; (3aR,4R,7S,7aS)-2-hydroxy-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione (N-hydroxy-5-exo-norbornene-2,3-dicarboximide);
palladium on activated charcoal;
In
tetrahydrofuran; methanol; N,N,N,N,N,N-hexamethylphosphoric triamide; diethyl ether; water;
DOI:10.1021/jm00117a027