Multi-step reaction with 11 steps
1.1: diisobutylaluminium hydride / dichloromethane; toluene / 1 h / -15 °C / Inert atmosphere
1.2: 2 h / 20 °C
2.1: dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
3.1: titanium tetrachloride / dichloromethane / 0.08 h / 0 °C / Inert atmosphere
3.2: 0.5 h / -78 °C / Inert atmosphere
4.1: methanol; sodium tetrahydroborate / 1 h / 0 °C / Inert atmosphere
5.1: 1H-imidazole / dichloromethane / 2 h / 0 °C / Inert atmosphere
6.1: sodium hydride / tetrahydrofuran; mineral oil / 0.5 h / 0 - 20 °C / Inert atmosphere
6.2: 0.5 h / 0 °C / Inert atmosphere
6.3: 0 - 20 °C / Inert atmosphere
7.1: 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride / toluene / 2 h / Inert atmosphere; Reflux
8.1: methanol; toluene-4-sulfonic acid / 0.5 h / 0 - 20 °C / Inert atmosphere
9.1: dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
10.1: magnesium / diethyl ether / 0.5 h / 0 - 20 °C / Inert atmosphere
10.2: 0 - 20 °C / Inert atmosphere
10.3: 20 °C
11.1: dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere
With
1H-imidazole; methanol; sodium tetrahydroborate; 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride; titanium tetrachloride; sodium hydride; diisobutylaluminium hydride; toluene-4-sulfonic acid; magnesium; dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione;
In
tetrahydrofuran; diethyl ether; dichloromethane; toluene; mineral oil;
7.1: Barton-McCombie deoxygenation / 10.2: Grignard reaction;
DOI:10.1016/j.tetasy.2011.11.013