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Amit K. Mandal 《ChemInform》2002,33(42):240-240
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A new method for the preparation of quaternary chiral aminals has been developed that employs an enamide‐type Overman rearrangement process. This methodology was applied to enantioselective total syntheses of (+)‐dibromophakellin and (+)‐dibromophakellstatin. 相似文献
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Shermin S. Goh Guilhem Chaubet Birgit Gockel Marie‐Caroline A. Cordonnier Hannah Baars Andrew W. Phillips Edward A. Anderson 《Angewandte Chemie (International ed. in English)》2015,54(43):12618-12621
Two enantioselective total syntheses of the nortriterpenoid natural product rubriflordilactone A are described, which use palladium‐ or cobalt‐catalyzed cyclizations to form the CDE rings, and converge on a late‐stage synthetic intermediate. These key processes are set up through the convergent coupling of a common diyne component with appropriate AB‐ring aldehydes, a strategy that sets the stage for the synthetic exploration of other members of this family of natural products. 相似文献
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Takuya Imaoka Osamu Iwamoto Kei‐ichi Noguchi Dr. Kazuo Nagasawa Prof. Dr. 《Angewandte Chemie (International ed. in English)》2009,48(21):3799-3801
Two members of a family of pyrrole–imidazole marine alkaloids, (+)‐dibromophakellin and the nonnatural congener (+)‐phakellin, were synthesized enantioselectively from 4‐hydroxy‐L ‐proline. The chiral aminal at C10 was constructed efficiently by means of an Overman‐type [3,3] sigmatropic rearrangement of an enamide (see scheme).