Total Synthesis of the Securinega Alkaloid (−)-Secu’amamine A
作者:Peng Liu、Sungwoo Hong、Steven M. Weinreb
DOI:10.1021/ja802700z
日期:2008.6.18
The first enantioselective total synthesis of the rearranged Securinega alkaloid (-)-secu'amamine A is reported starting from D-proline as the source of absolute chirality. The synthesis requires 15 steps starting from D-proline-derived N-trityl aldehyde 11 and proceeds in approximately 9% overall yield. Key steps include a stereoselective conjugate addition of pyrrolidino enedione 19 to afford indolizidine
据报道,以 D-脯氨酸作为绝对手性来源,首次对重排的 Securinega 生物碱 (-)-secu'amamine A 进行了对映选择性全合成。合成需要 15 个步骤,从 D-脯氨酸衍生的 N-三苯甲基醛 11 开始,并以大约 9% 的总产率进行。关键步骤包括吡咯烷烯二酮 19 的立体选择性共轭加成以提供作为主要产物的吲哚里西啶 24 和二酮酯 25 的环化/内酯化以产生四环 26。此外,对合成生物碱的 1H NMR NOE 研究和 X 射线分析已经确定吲哚里西啶部分是反式融合的。
[EN] STEREOSELECTIVE SYNTHESIS OF PHOSPHOROTHIOATE OLIGORIBONUCLEOTIDES<br/>[FR] SYNTHÈSE STÉRÉOSÉLECTIVE D'OLIGORIBONUCLÉOTIDES DE PHOSPHOROTHIOATE
申请人:ETH ZUERICH
公开号:WO2017198775A1
公开(公告)日:2017-11-23
The present invention relates to chiral phosphoramidites represented by formula (Ia) or formula (Ib) as novel monomers for the synthesis of stereodefined phosphorothioate MOE oligonucleotides. Furthermore, the present invention relates to a method for synthesizing stereodefined phosphorothioate MOE oligonucleotides using said novel chiral phosphoramidites.
[EN] TECHNOLOGIES USEFUL FOR OLIGONUCLEOTIDE PREPARATION<br/>[FR] TECHNOLOGIES UTILES POUR LA PRÉPARATION D'OLIGONUCLÉOTIDES
申请人:WAVE LIFE SCIENCES LTD
公开号:WO2020191252A1
公开(公告)日:2020-09-24
Among other things, the present disclosure provides technologies for oligonucleotide preparation, particularly chirally controlled oligonucleotide preparation, which technologies provide greatly improved crude purity and yield, and significantly reduce manufacturing costs.
[EN] FUSED TRICYCLIC PYRIDAZINONE COMPOUNDS USEFUL TO TREAT ORTHOMYXOVIRUS INFECTIONS<br/>[FR] COMPOSÉS TRICYCLIQUES FUSIONNÉS DE PYRIDAZINONE UTILES POUR TRAITER DES INFECTIONS À ORTHOMYXOVIRUS
申请人:NOVARTIS AG
公开号:WO2018042303A1
公开(公告)日:2018-03-08
The invention provides compounds of Formula (I): (I) as further described herein, as well as pharmaceutical compositions comprising such compounds, and methods to use the compounds and pharmaceutical compositions for treatment of certain viral disorders, including influenza.
The present invention relates to chirally controlled oligonucleotides, chirally controlled oligonucleotide compositions, and the method of making and using the same. The invention specifically encompasses the identification of the source of certain problems with prior methodologies for preparing chiral oligonucleotides, including problems that prohibit preparation of fully chirally controlled compositions, particularly compositions comprising a plurality of oligonucleotide types. In some embodiments, the present invention provides chirally controlled oligonucleotide compositions. In some embodiments, the present invention provides methods of making chirally controlled oligonucleotides and chirally controlled oligonucleotide compositions.