Patent ID: 8227645
Filing Date: 2012-07-24
Classification: C07B,C07C,C07D,C07J

Abstract:
1. A cyclisation process for forming a multiple ring compound, the process comprising reacting an isoprenoid compound with an acetal initiator under conditions sufficient to form the multiple ring compound, wherein the cyclisation process comprises an intramolecular cyclisation reaction of the isoprenoid compound, and wherein the acetal initiator is an oxygen acetal, a thioacetal or a selenoacetal having one of the following general formulas (I) or (II): wherein: A and B are independently heteroatoms selected from the group consisting of O, S and Se; R D is an aliphatic, cycloaliphatic or arylaliphatic bridge containing from 1 to about 12 carbon atoms, completing a non-aromatic ring that includes from 0 to about 2 heteroatoms; and R