1: With n-butyllithium; n-butyl-magnesium chloride in hexane; toluene T=-5 - 0°C; 1.75 h; 2: With iodine cloride in hexane; dichloromethane; toluene T=-5°C; 0.333333 h;

1: tin; hydrochloric acid View Scheme

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hydrogen bromide; acetic acid; tetrabutylammomium bromide 48 h; Heating / reflux;