The present invention relates to certain novel substituted thiophene compounds and the finding that they display useful efficacy in the inhibition of the p38α MAPK enzyme. This provides for use of the compounds in various treatment methodologies related to MAPK inhibition, including the treatment of inflammation.
Stereoselective, nitro-Mannich/lactamisation cascades for the direct synthesis of heavily decorated 5-nitropiperidin-2-ones and related heterocycles
作者:Pavol Jakubec、Dane M Cockfield、Madeleine Helliwell、James Raftery、Darren J Dixon
DOI:10.3762/bjoc.8.64
日期:——
stereoselective synthesis of heavily decorated 5-nitropiperidin-2-ones and related heterocycles has been developed. A highly enantioenriched substituted 5-nitropiperidin-2-one was synthesised in a four component one-pot reaction combining an enantioselectiveorganocatalyticMichaeladdition with the diastereoselective nitro-Mannich/lactamisation cascade. Protodenitration and chemoselective reductive manipulation
作者:Robert K. Boeckman、Hui Wang、Kyle W. Rugg、Nathan E. Genung、Ke Chen、Todd R. Ryder
DOI:10.1021/acs.orglett.6b03137
日期:2016.12.2
The convergent total synthesis of the manzamine alkaloid (−)-nakadomarin A (1) is described. The retrosynthetic analysis recognized spirocycle 3, assembled via an organocatalyst-promoted Michaeladdition/cyclization between bicyclic lactam 4 and furan aldehyde 5, both accessible from achiral starting materials and on a multigram scale. Lactam 4 is assembled through an SN2′/reduction/Staudinger/retro-aza-Claisen
描述了manzamine生物碱(-)-nakadomarin A(1)的会聚全合成。逆向合成分析确认了螺环3,其通过有机催化剂促进的双环内酰胺4和呋喃醛5之间的迈克尔加成/环化而组装,两者均可从非手性起始原料获得并且以克数表示。内酰胺4通过S N 2'/还原/ Staudinger /复古-氮杂-Claisen序列按比例组装。螺环化后,nakadomarin的合成仅需六个步骤即可完成。
Total synthesis of (−)-nakadomarin A
作者:Andrew F. Kyle、Pavol Jakubec、Dane M. Cockfield、Ed Cleator、John Skidmore、Darren J. Dixon
DOI:10.1039/c1cc13665h
日期:——
addition, a nitro-Mannich/lactamization cascade, a furan N-acyliminium cyclisation, a sequential alkyne RCM/syn-reduction and an alkene RCM has allowed a 19 step, highly stereoselective synthesis of (-)-nakadomarin A.
A concise diastereoselective totalsynthesis of (−)-nakadomarin A has been completed in 21 steps from d-pyroglutamic acid. Key steps include an enecarbamate Michael addition/furan-N-acyliminium ion cascade cyclization to provide the tetracyclic core and ring-closing alkyne and alkene metatheses to construct the fifteen- and eight-membered azacycles, respectively.
由d-焦谷氨酸通过 21 个步骤完成了 (−)-nakadomarin A 的简明非对映选择性全合成。关键步骤包括烯氨基甲酸酯迈克尔加成/呋喃-N-酰亚胺离子级联环化以提供四环核心以及闭环炔烃和烯烃复分解反应以分别构建十五元和八元氮杂环。