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[摘要]:An efficient approach to generate a fully functionalized cyclopenta[a]phenanthrene 34, the basic carbon framework of andrastin C (1c), is described. The present synthetic route features a stereoselective intramolecular Diels-Alder reaction of triene 12 and an intramolecular carbonyl ene reaction of 3-phenanthreny1-2-(methoxymethoxy)propanal 31. |
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