[EN] NEUROLOGICALLY-ACTIVE COMPOUNDS<br/>[FR] COMPOSES PRESENTANT UNE ACTIVITE NEUROLOGIQUE
申请人:UNIV SYDNEY
公开号:WO2006000043A1
公开(公告)日:2006-01-05
The invention provides a compound of the formula (I): wherein R is methyl, ethyl, propyl, isopropyl, butyl, pentyl, neo-pentyl or cyclohexyl, or a salt or solvate thereof. These compounds are selective GABAC receptor antagonists. The invention also provides pharmaceutical compositions comprising a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof. The invention also provides methods of enhancing the cognitive activity of an animal and methods of stimulating memory capacity in an animal, comprising the step of administering to the animal an effective amount of a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof.
bielschowskysin has been synthesized. First, a large library of precursors for a photochemical [2 + 2] cycloaddition was prepared and tested, but with limited success. In the end, a thermal [2 + 2] cycloaddition followed by appropriate regio- and stereocontrolled functionalization efficiently gave access to the desired bicyclo[3.2.0]heptane core. An optimized route to this remarkable molecular structure is presented
Kinetic resolution of a series of cyclopentene-1,4-diol derivatives has been successfully achieved with enantiomeric excess up to 99.4% and a kf/ks ratio of 55 by a rhodium-catalyzed redox-isomerization reaction in a noncoordinating solvent.
在非配位溶剂中,通过铑催化的氧化还原异构化反应,已成功实现了一系列环戊烯-1,4-二醇衍生物的动力学拆分,对映体过量高达99.4%,k f / k s比为55。
SYNTHESES OF OPTICALLY ACTIVE (+)- AND (−)-UNTENONE A
Opticallyactive (+)- and (−)-untenone were synthesized from (S)-4-[(tert-butyldimethylsilyl)oxy]-2-cyclopentenone and untenone A isolated from marine sponge was shown to be racemic.
prepared in 56% overall yield through the five-step sequence. Selective transformation of the PGE to PGD structure can be realized simply by appropriate selection of the hydroxyl protective groups in the five-membered ring and ω side-chain units. The vicinal carba-condensation using methyl 6-formyl-5-hexynoate as the α side-chain aldehyde unit followed by deoxygenation from the aldol products gives
整个前列腺素 (PG) 骨架的一锅高产构建是通过铜介导的 ω 侧链单元与 4R 氧化的 2-环戊烯酮衍生物的共轭加成和原位醛醇缩合的组合来实现的。用α侧链醛生成烯醇化物。随后从加合物中去除 7-羟基并解封保护基团,得到 E 系列的 PG。PGE1 已通过五步序列以 56% 的总收率制备。Selective transformation of the PGE to PGD structure can be realized simply by appropriate selection of the hydroxyl protective groups in the five-membered ring and ω side-chain units. 使用 6-甲酰基-5-己烯酸甲酯作为 α 侧链醛单元的邻位 carba 缩合,然后从羟醛产物脱氧得到 5,6-didehydro-PGE2 衍生物,在各种天然