Nonracemic Betti Base as a New Chiral Auxiliary: Application to Total Syntheses of Enantiopure (2S,6R)-Dihydropinidine and (2S,6R)-Isosolenopsins
摘要:
Total syntheses of enantiopure alkaloidal natural products (2S,6R)-dihydropinidine (as hydrochloride) and (2S,6R)isosolenopsins (as hydrochlorides) were achieved in four steps and in 80-82% total yields by using a synthetic strategy of the formation-cleavage of 1,3-oxazinane. (S)-Betti base was proved to be an excellent chiral auxiliary and a novel Pd/C catalyzed N-debenzylation straightforward to amine hydrochloride was developed in the presence of CH2Cl2.
[EN] CYCLIC PHOSPHATES AND CYCLIC PHOSPHORAMIDATES FOR THE TREATMENT OF NEUROLOGIC DISORDERS<br/>[FR] PHOSPHATES CYCLIQUES ET PHOSPHORAMIDATES CYCLIQUES POUR LE TRAITEMENT DE TROUBLES NEUROLOGIQUES
申请人:RETROPHIN INC
公开号:WO2017099822A1
公开(公告)日:2017-06-15
Compounds having the following formula (I): and pharmaceutically acceptable salts thereof, wherein A, B, D, E and R1 are as defined herein, are provided. Methods comprising the use of such compounds for the treatment of neurological disorders, such as pantothenate kinase-associated neurodegeneration, and pharmaceutical compositions containing such compounds, and their use in the treatment of neurological disorders, also are provided.
β‐C−H Allylation of Trialkylamines with Allenes Promoted by Synergistic Borane/Palladium Catalysis
作者:Ming Zhang、Zi‐Lu Tang、Heng Luo、Xiao‐Chen Wang
DOI:10.1002/anie.202317610
日期:2024.1.25
The β-C−H allylation reactions of trialkylamines with allenes were accomplished by a synergistic borane/palladium catalysis. The borane and palladium catalysts promoted the formation of an enamine intermediate from a trialkylamine and a palladium-π-allyl intermediate from an allene, respectively.
The present specification discloses honeybee repellents exhibiting repellent properties similar to 2-heptanone, compositions comprising such repellents, uses to repel a honeybee from a mammal, location, plant, structure treated of such repellents, and methods of treating a mammal, location, plant, structure by applying such repellents.