Princeton sludge catalyst

Sludge catalyst (2, 20 3, 7). Details of the Princeton sludge catalyst have been published. It is a heavy yellow oil that can be stored for some time under cyclohexane. Activity can be augmented or restored by addition of AlBr3. The catalyst probably consists of polymerized isobutene, formed by dehydrobromina-tion of t-butyl bromide. It has been used to rearrange hydrogenated Bisnor-S to diadamantane in 70% yield. 

Pregnenolone, 368 Pienylation, 307-308 Prenyl bromide, 151 Princeton sludge catalyst, 17 Prismanes, 575 Proline, 411, 492-493... 

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