Multi-step reaction with 12 steps
1.1: 90 percent / carbon tetrabromide; triphenylphosphine / tetrahydrofuran / 0 - 20 °C
2.1: copper(I) cyanide; MeLi / tetrahydrofuran; diethyl ether / 0.5 h / 0 °C
2.2: 83 percent / tetrahydrofuran; diethyl ether / 1 h / -78 °C
3.1: 85 percent / acetic acid / H2O / 3 h / 70 °C
4.1: 81 percent / silver(I) carbonate on Celite / benzene / 1 h / Heating
5.1: 95 percent / DCC; DMAP / CH2Cl2 / 24 h / 20 °C
6.1: 93 percent / DIBAL-H / diethyl ether; hexane / 0.5 h / -78 °C
7.1: 21 percent / toluene / 2 h / 80 °C
8.1: 97 percent / triethylamine; DMAP / CH2Cl2 / 3 h / 20 °C
9.1: 87 percent / hydrido(triphenylphosphine)copper(I) hexamer / benzene; H2O / 0.75 h / Heating
10.1: 89 percent / potassium carbonate / methanol / 5 h / 20 °C
11.1: 48 percent / diethyl azodicarboxylate; triphenylphosphine / toluene / -30 - 20 °C
12.1: 94 percent / potassium carbonate / methanol / 3 h / 20 °C
With
dmap; carbon tetrabromide; hydrido(triphenylphosphine)copper(I) hexamer; methyllithium; copper(l) cyanide; diisobutylaluminium hydride; potassium carbonate; acetic acid; triethylamine; dicyclohexyl-carbodiimide; triphenylphosphine; silver carbonate; diethylazodicarboxylate;
In
tetrahydrofuran; methanol; diethyl ether; hexane; dichloromethane; water; toluene; benzene;
7.1: Wittig reaction / 11.1: Mitsunobu esterification;
DOI:10.1021/jo050750x