Multi-step reaction with 10 steps
1: SO3*Py; Et3N / ethyl acetate; dimethylsulfoxide / 1 h / cooling
2: 83.1 percent / NaH / tetrahydrofuran / 0.5 h / 20 °C
3: LiAlH4; (S)-BINOL / tetrahydrofuran; ethanol / 2 h / cooling
4: para-toluenesulfonic acid monohydrate / toluene; tetrahydrofuran / 0.75 h / 20 °C
5: LiAlH4 / tetrahydrofuran / 0.75 h / cooling
6: i-Pr2NEt / tetrahydrofuran / 0.5 h / -15 - -10 °C
7: i-Pr2NEt / tetrahydrofuran; methanol / 0.17 h / -10 - -5 °C
8: K2CO3 / tetrahydrofuran; methanol; dimethylformamide / 4 h / 50 °C
9: 10.5 g / K2CO3 / methanol / 2 h / 20 °C
10: 90.7 percent / SO3*Py; i-Pr2NEt / ethyl acetate; dimethylsulfoxide / 0.83 h / cooling
With
lithium aluminium tetrahydride; pyridine-SO3 complex; (S)-[1,1']-binaphthalenyl-2,2'-diol; sodium hydride; potassium carbonate; toluene-4-sulfonic acid; triethylamine; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; methanol; ethanol; dimethyl sulfoxide; ethyl acetate; N,N-dimethyl-formamide; toluene;
2: Horner-Emmons reaction;
DOI:10.1016/S0968-0896(02)00085-8