Synthesis of the C-8-C-24 Fragment of Maltepolide C by Using a Tandem Dihydroxylation/S<sub>N</sub>2 Cyclization Sequence
作者:Debendra K. Mohapatra、D. Sai Reddy、G. Sudhakar Reddy、Jhillu S. Yadav
DOI:10.1002/ejoc.201500629
日期:2015.8
A highly stereoselective synthesis of the C-8–C-24fragment of maltepolideC has been achieved in a convergent and efficient manner by utilizing a tandem Sharpless asymmetric dihydroxylation (SAD)/SN2 cyclization reaction sequence as the key step. Other important steps include a Crimmins-modified Evans aldol reaction, a Brown asymmetric allylation, a Horner–Wadsworth–Emmons olefination, and a Corey–Bakshi–Shibata
A general and concise stereodivergent chiral pool approach toward trans-(4S,5R)- and cis-(4R,5R)-5-alkyl-4-methyl-γ-butyrolactones: Syntheses of (+)-trans- and (+)-cis-whisky and cognac lactones from d-(+)-mannitol
A straightforward synthesis of (+)-trans-(4S,5R)- and (+)-cis-(4R,5R)-whisky lactones starting from d-(+)-mannitol has been reported here in fewer number of efficient steps compared to existing literature processes involving d-mannitol as the chiral pool starting material. Chiron approach directly translated chirality of d-mannitol to one of the two chiral centers in these target molecules. Toward
从d -(+)-甘露醇开始直接合成 (+)-反式-(4 S ,5 R )- 和 (+)-顺式-(4 R ,5 R )-威士忌内酯的报道较少与涉及d-甘露醇作为手性池起始材料的现有文献方法相比,有效步骤的数量。Chiron 方法直接将d-甘露醇的手性转化为这些靶分子中的两个手性中心之一。为此,立体异构纯的反式和顺式在倒数第二步中形成碘甲基-γ-内酯。这两种作为通用的高级通用中间体也分别转化为 (+)-反式-(4 S ,5 R )- 和 (+)-顺式-(4 R ,5 R )-干邑内酯。据我们所知,迄今为止还没有报道从d-甘露醇开始合成干邑内酯。所有这些内酯都被确定为陈年酒精饮料的关键香气成分。
Pyrimidine Sulphonamide Derivatives as Chemokine Receptor Modulators
申请人:Cheshire David Ranulf
公开号:US20080096860A1
公开(公告)日:2008-04-24
A compound of formula (1), or a pharmaceutically acceptable salt, solvate or in vivo hydrolysable ester thereof and pharmaceutical compositions comprising these, all for use in the treatment of chemokine mediated diseases and disorders.
Pyrimidine sulphonamide derivatives as chemokine receptor modulators
申请人:AstraZeneca AB
公开号:US08269002B2
公开(公告)日:2012-09-18
A compound of formula (I), or a pharmaceutically acceptable salt, solvate or in vivo hydrolysable ester thereof and pharmaceutical compositions comprising these, all for use in the treatment of chemokine mediated diseases and disorders.