Reagents which have been used on ketones to yield mesityl oxide type condensation products include sodium eth~ xide,~ hydrogen halides, 6 aluminum halides, 6 calcium h~ dride,~ calcium carbideJ8 diethyl zinc, ga mixture of zinc chloride and acetyl chloride, lo sulfuric acid, ll potassium hydroxide, l2 phosphorus pentachloride, la triphenylaluminum, G sodium, l4 and alumina.'b Bromomagnesium aminesJ16 bromomagnesium alkoxides, 17 ...