52506-21-5Relevant articles and documents
Synthesis of the 4-azatricyclo[5.2.2.04,8]undecan-10-one core of Daphniphyllum alkaloid calyciphylline A using a Pd-catalyzed enolate alkenylation
Sole, Daniel,Urbaneja, Xavier,Bonjoch, Josep
, p. 5461 - 5464 (2005)
(Chemical Equation Presented) The ABC ring system of the natural product calyciphylline A has been synthesized. The key steps were a palladium-catalyzed intramolecular coupling of an amino-tethered vinyl bromide with a ketone using potassium phenoxide as
Synthetic method of huperzine A
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Paragraph 0075; 0077; 0082-0085, (2019/05/15)
The invention belongs to the technical field of medicine synthesis and particularly relates to a synthetic method of huperzine A. The method includes twelve steps of reactions, 1,4-dioxaspiro[4.5]decan-8-one being a raw material, so that the chemical synthesis of the huperzine A is completed at a high total yield. The method is fewer in reaction steps, is simple in operations, has high yield, is stable in intermediates and gentle in reaction conditions, and is easy to control in reactions.
Iridium-catalyzed asymmetric hydrogenation of α-substituted α,β-unsaturated acyclic ketones: Enantioselective total synthesis of (-)-mesembrine
Zhang, Qian-Qian,Xie, Jian-Hua,Yang, Xiao-Hui,Xie, Jian-Bo,Zhou, Qi-Lin
, p. 6158 - 6161 (2013/02/23)
A highly efficient asymmetric hydrogenation of α-substituted α,β-unsaturated acyclic ketones catalyzed by chiral spiro iridium complexes for the preparation of chiral 2-substituted allylic alcohols has been developed (ee up to 99.7%). This method provides a concise route to (-)-mesembrine (34% yield, 12 steps).