在这里,我们报告了通过后期 C-N 键激活首次全合成瑞香素 L 型生物碱瑞香素 L 甲酯和 calyciphylline K。secodaphniphylline 型生物碱 caldaphnidine D 的首次合成也是通过类似的策略实现的。我们合成中采用的其他关键转化是简单的邻位二醇烯化和有效的自由基环化级联。生物学研究表明两种合成化合物具有良好的神经保护活性。
The present invention provides a compound of Formula (I)
or a pharmaceutically salt thereof wherein R
1
, R
2
, Ra, L, Z, Z
1
and Z
2
are as defined herein, that act as Ghrelin antagonists or inverse agonists; pharmaceutical compositions thereof; and methods of treating diseases, disorders, or conditions mediated by the antagonism of the Ghrelin receptor.
[EN] ARYL HETEROBICYCLIC COMPOUNDS AS KV1.3 POTASSIUM SHAKER CHANNEL BLOCKERS<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES ARYLÉS EN TANT QUE BLOQUEURS DU CANAL POTASSIQUE SHAKER KV1.3
申请人:DE SHAW RES LLC
公开号:WO2021071832A1
公开(公告)日:2021-04-15
A compound of Formula (I), or a pharmaceutically acceptable salt thereof, is described, where the substituents are as defined herein. Pharmaceutical compositions including the same and method of using the same are also described.
α-Ketophosphonates are prepared from 2-alkyl-2-phosphonyl-1,3-dithianes.
α-酮膦酸盐是由2-烷基-2-膦酰基-1,3-二硫烷合成的。
Oxidative Cyclization Based on Reversing the Polarity of Enol Ethers and Ketene Dithioacetals. Construction of a Tetrahydrofuran Ring and Application to the Synthesis of (+)-Nemorensic Acid
作者:Bin Liu、Shengquan Duan、Angela C. Sutterer、Kevin D. Moeller
DOI:10.1021/ja026739l
日期:2002.8.1
trapping group. The stereochemical outcome of cyclization reactions originating from the oxidation of an enol ether was found to be controlled by stereoelectronic factors. The utility of these cyclization reactions was illustrated with the synthesis of a key tetrahydrofuran building block for the synthesis of linalool oxide and rotundisine. Cyclization reactions triggered by the oxidation of a ketene dithioacetal
skeletons and promising biological profiles of the Daphniphyllum alkaloids have generated intense interest from the synthetic chemistry community. Herein, the first and enantioselective totalsynthesis of (-)-caldaphnidine O, a complex bukittinggine-type Daphniphyllum alkaloid, is described. The key transformations in this concise approach included an intramolecular aza-Michael addition, a ring expansion