Multi-step reaction with 12 steps
1: 81 percent / BH3*THF, TFA
2: DCC
3: DDQ / toluene / Heating
4: 1.) Hg(OTFA)2, 2.) KI, 3.) I2
5: Pd2(dba)3, P(o-tolyl)3, K2CO3 / toluene / Heating
6: Zn, AcOH
7: DCC
8: 93 percent / Zn, AcOH / ethyl acetate
9: 82 percent / Et3N, DMAP
10: 91 percent / Bu3P / benzene / 60 °C
11: 3-n-butyl-1,2-benzisothiazole-1,1-dioxide oxide / 48 h
12: NaBH4, AcOH
With
dmap; sodium tetrahydroborate; 3-butyl-1,2-benzisothiazole-1,1-dioxide; borane-THF; tris(dibenzylideneacetone)dipalladium (0); tributylphosphine; iodine; mercury(II) trifluoroacetate; potassium carbonate; acetic acid; triethylamine; dicyclohexyl-carbodiimide; tris-(o-tolyl)phosphine; trifluoroacetic acid; 2,3-dicyano-5,6-dichloro-p-benzoquinone; potassium iodide; zinc;
In
ethyl acetate; toluene; benzene;
DOI:10.1021/ja9809408