Multi-step reaction with 11 steps
1.1: oxalyl dichloride; dimethyl sulfoxide; triethylamine / dichloromethane / -78 - 20 °C / Inert atmosphere
1.2: 20 °C / Inert atmosphere
2.1: diisobutylaluminium hydride / diethyl ether; hexane / -78 - 20 °C / Inert atmosphere
3.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
4.1: di-μ-chlorobis[(η(5)-(S)-(pR)-2-(2'-(4'-(1-methylethyl))oxazolinyl)cyclopentadienyl, 1-C, 3'-N)(η(4)-tetraphenylcyclobutadiene)cobalt]dipalladium / dichloromethane / 72 h / 45 °C / Inert atmosphere
5.1: Grubbs catalyst first generation / dichloromethane / 65 °C
6.1: N-iodo-succinimide / chloroform / 18 h / Inert atmosphere
7.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / toluene / 12 h / Reflux; Inert atmosphere
8.1: hydrogenchloride; water / methanol / 1 h / 20 °C
9.1: sodium hydrogencarbonate; 3-chloro-benzenecarboperoxoic acid / dichloromethane / 24 h / 20 °C
10.1: sulfuric acid / 1,4-dioxane / 8 h / 20 °C
11.1: water; sodium hydroxide / methanol / 12 h / 20 °C
With
Grubbs catalyst first generation; hydrogenchloride; N-iodo-succinimide; oxalyl dichloride; di-μ-chlorobis[(η(5)-(S)-(pR)-2-(2'-(4'-(1-methylethyl))oxazolinyl)cyclopentadienyl, 1-C, 3'-N)(η(4)-tetraphenylcyclobutadiene)cobalt]dipalladium; sulfuric acid; water; diisobutylaluminium hydride; sodium hydrogencarbonate; dimethyl sulfoxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; 3-chloro-benzenecarboperoxoic acid; sodium hydroxide;
In
1,4-dioxane; methanol; diethyl ether; hexane; dichloromethane; chloroform; toluene;
1.1: Swern oxidation / 1.2: Horner-Wadsworth-Emmons olefination / 4.1: Overman rearrangement;
DOI:10.1039/c0ob00619j