Multi-step reaction with 15 steps
1.1: Et3N; pivaloyl chloride / diethyl ether / 1 h / 0 °C
1.2: n-BuLi / tetrahydrofuran; hexane; diethyl ether / 2 h / 0 °C
2.1: 74 percent / TiCl4; i-Pr2NEt; N-methyl-2-pyrrolidinone / CH2Cl2 / -78 - -40 °C
3.1: 91 percent / 4-(dimethylamino)-pyridine; DIEA / CH2Cl2 / 72 h / 20 °C
4.1: 95 percent / LiBH4; MeOH / diethyl ether / 2 h / 0 °C
5.1: oxalyl chloride; dimethylsulfoxide; Et3N / CH2Cl2 / 0.25 h / -78 - 0 °C
6.1: t-BuOK / tetrahydrofuran; toluene / 1 h / 0 °C
6.2: 90 percent / tetrahydrofuran; toluene / 2 h / 20 °C
7.1: Cl2(Cy3P)(IMes)Ru=CHPh / CH2Cl2 / 8 h / Heating
8.1: 83 percent / H2 / Pd/C / ethyl acetate / 12 h
9.1: 0.42 g / oxalyl chloride; dimethylsulfoxide; DIEA / CH2Cl2 / -78 - 0 °C
10.1: Zn(OTf)2; (-)-N-methylephedrine; NEt3 / 4A molecular sieves / toluene / 0.5 h / 20 °C
10.2: 70 percent / toluene
11.1: 97 percent / 4-(dimethylamino)pyridine; DIEA / CH2Cl2 / 72 h / 20 °C
12.1: 97 percent / H2 / Pd/C / ethanol / 36 h
13.1: 0.062 g / 2,6-lutidine / CH2Cl2 / 1 h / -78 °C
14.1: n-BuLi / tetrahydrofuran; hexane / 1 h / -78 °C
14.2: HMPA / tetrahydrofuran; hexane / 0.5 h / -78 °C
14.3: 95 percent / tetrahydrofuran; hexane / 1 h
15.1: 64 percent / Pd(PPh3)4; CuI; DIEA / tetrahydrofuran / 4 h / 20 °C
With
2,6-dimethylpyridine; 1-methyl-pyrrolidin-2-one; methanol; dmap; copper(l) iodide; lithium borohydride; tetrakis(triphenylphosphine) palladium(0); Cl2(PCy3)(N,N'-(Mes)2-imidazolidin-2-yl)Ru=CHC6H5; n-butyllithium; oxalyl dichloride; (-)-N-methylephedrine; potassium tert-butylate; hydrogen; pivaloyl chloride; titanium tetrachloride; zinc trifluoromethanesulfonate; dimethyl sulfoxide; triethylamine; N-ethyl-N,N-diisopropylamine;
palladium on activated charcoal; 4 A molecular sieve;
In
tetrahydrofuran; diethyl ether; ethanol; hexane; dichloromethane; ethyl acetate; toluene;
9.1: Swern oxidation;
DOI:10.1021/ja0455852