Synthesis of derivatives of (1S,2R)-1-phenyl-2-[(S)-1-aminopropyl]-N,N-diethylcyclopropanecarboxamide (PPDC) modified at the 1-aromatic moiety as novel NMDA receptor antagonists: the aromatic group is essential for the activity
Enantioselective Total Synthesis of (-)-Clavosolide A and B
作者:Jung-Beom Son、Si-Nae Kim、Na-Yeong Kim、Min-Ho Hwang、Won-Sun Lee、Duck-Hyung Lee
DOI:10.5012/bkcs.2010.31.03.653
日期:2010.3.20
Enantioselective total synthesis of (-)-clavosolide A and B was reported in full including the synthesis of proposed structure of (-)-clavosoldie A (1), revised structure of (-)-clavosoldie A (5), and revised structure of (-)-clavosoldie B (6). The relative and absolute stereochemistries of the natural products were confirmed unambiguously by comparing the optical rotation values and $^1H$ and $^13}C$ NMR spectra of them.
完全报道了(-)-clavosolide A和B的对映选择性全合成,包括所提出的(-)-clavosolide A (1)结构的合成、修订后的(-)-clavosolide A (5)结构的合成以及修订后的(-)-clavosolide B (6)结构的合成。通过比较其旋光值和$^1H$及$^13}C$核磁共振谱,明确证实了这些天然产物的相对和绝对立体化学。
COMPOUND AND USE THEREOF IN SYNTHESIS OF BRIVARACETAM INTERMEDIATE AND CRUDE DRUG
申请人:FUJIAN HAIXI PHARMACEUTICALS CO., LTD
公开号:US20210261515A1
公开(公告)日:2021-08-26
The present application provides a compound in formula III, and further provides a use of the compound in the synthesis of a Brivaracetam intermediate and a crude drug, and a synthesis method. A raw material involved in the method of the present application is low in costs and easily available; (R)-4-propyl-dihydrofuran-2-ketone having high optical purity can be prepared; complicated separation and purification steps are avoided; costs are reduced, and the method is more applicable to industrial production.
Stereochemical Diversity-Oriented Conformational Restriction Strategy. Development of Potent Histamine H<sub>3</sub> and/or H<sub>4</sub> Receptor Antagonists with an Imidazolylcyclopropane Structure
potent H3 and H4 receptor antagonists, a series of conformationally restricted analogues of histamine with a chiral cis- or trans-cyclopropane structure were designed on the basis of this strategy. These target compounds with stereochemical diversity were synthesized from the versatile chiral cyclopropane units (1S,2R)- and (1R,2R)-2-(tert-butyldiphenylsilyloxy)methyl-1-formylcyclopropane (6 and 7, respectively)
[EN] COMPOUND AND USE THEREOF IN SYNTHESIS OF BRIVARACETAM INTERMEDIATE AND CRUDE DRUG<br/>[FR] COMPOSÉ ET SON UTILISATION DANS LA SYNTHÈSE D'INTERMÉDIAIRE DE BRIVARACÉTAM ET DE MÉDICAMENT BRUT<br/>[ZH] 化合物及其在合成布瓦西坦(Brivaracetam)中间体及原料药中的用途
Compound and use thereof in synthesis of brivaracetam intermediate and crude drug
申请人:FUJIAN HAIXI PHARMACEUTICALS CO., LTD
公开号:US11247977B2
公开(公告)日:2022-02-15
The present application provides a compound in formula III, and further provides a use of the compound in the synthesis of a Brivaracetam intermediate and a crude drug, and a synthesis method. A raw material involved in the method of the present application is low in costs and easily available; (R)-4-propyl-dihydrofuran-2-ketone having high optical purity can be prepared; complicated separation and purification steps are avoided; costs are reduced, and the method is more applicable to industrial production.
本申请提供了一种式 III 的化合物,并进一步提供了该化合物在合成 Brivaracetam 中间体和粗制药物中的用途以及合成方法。本申请方法所涉及的原料成本低、易得,可制备光学纯度高的(R)-4-丙基-二氢呋喃-2-酮,避免了复杂的分离纯化步骤,降低了成本,更适用于工业化生产。