Selective palladium-catalyzed amination of the heterocyclic core of variolins
作者:Alejandro Baeza、Carolina Burgos、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1016/j.tetlet.2007.02.011
日期:2007.4
palladium-catalyzed amination of the pyrido[3′,3′:4,5]pyrrolo[1,2-c]pyrimidine nucleus, the heterocyclic core of the variolinalkaloids, is described. The method allows the introduction of amino and aryl- and alkylamino substituents on the C9 position in advanced precursors of variolin B and deoxyvariolin.
描述了一种新的,选择性钯催化的天花碱生物碱的杂环核心,吡啶并[3',3':4,5]吡咯并[1,2- c ]嘧啶核。该方法允许在variolin B和deoxyvariolin的高级前体中的C9位上引入氨基,芳基和烷基氨基取代基。
A simple, general synthesis of carbonimidic dichlorides
作者:Claire M. Gober、Hoang V. Le、Bruce Ganem
DOI:10.1016/j.tetlet.2012.06.046
日期:2012.8
The reaction of aliphatic and aromatic isonitriles with sulfuryl chloride provides an efficient, general route to the corresponding dichlorides without byproducts of free-radical substitution.
[EN] TLR2 MODULATOR COMPOUNDS, PHARMACEUTICAL COMPOSITIONS AND USES THEREOF<br/>[FR] COMPOSÉS MODULATEURS DE TLR2, COMPOSITIONS PHARMACEUTIQUES ET LEURS UTILISATIONS
申请人:AXIAL THERAPEUTICS INC
公开号:WO2021242923A1
公开(公告)日:2021-12-02
The present disclosure relates to compounds which modulate the activity of Toll-like receptor (TLR) proteins, including agonists or activators, partial agonists, and antagonists. Of particular interest of compounds that modulate the activity of TLR2, as well as methods of using such compounds to treat cancer and other disorders associated with a TLR2 pathway.
Application of Selective Palladium-Mediated Functionalization of the Pyrido[3′,2′:4,5]pyrrolo[1,2-c]pyrimidine Heterocyclic System for the Total Synthesis of Variolin B and Deoxyvariolin B
作者:Alejandro Baeza、Javier Mendiola、Carolina Burgos、Julio Alvarez-Builla、Juan J. Vaquero
DOI:10.1002/ejoc.201000599
日期:2010.10
TosMIC equivalent afforded trihalosubstituted pyrido[3',2':4,5]pyrrolo[1,2-c]pyrimidine. This compound was used in a new total synthesis of the alkaloid variolin B by selective and sequential C-N, C-C, and C-O palladium-mediated functionalization at the C9, C5, and C4 positions of the pyrido[3',2':4,5]pyrrolo[1,2-c]pyrimidine system. A formal synthesis of deoxyvariolin B is also described by using
受保护的 3-溴-2-(溴甲基)-4-甲氧基吡咯并[2,3-b]吡啶和甲苯磺酰甲基异氰化物 (TosMIC) 反应得到吡啶并[3',2':4,5]吡咯并[1,2 -c]嘧啶衍生物,收率良好。该化合物通过在 C5 位置安装嘧啶部分、水解和脱羧而转化为高级中间体,用于天然生物碱 variolin B 的全合成或正式合成。 3-溴-2-(溴甲基)-4- 的反应氯吡咯并[2,3-b]吡啶与N-甲苯磺酰甲基二氯甲酰亚胺作为合成的TosMIC等价物得到三卤代吡啶并[3',2':4,5]吡咯并[1,2-c]嘧啶。该化合物通过选择性和连续的 CN、CC 和 CO 钯介导的吡啶基 C9、C5 和 C4 位置的官能化,用于生物碱 variolin B 的新全合成 [3',2':4,5]吡咯并[1,2-c]嘧啶系统。通过使用相同的合成策略还描述了 deoxyvariolin B 的正式合成。
Development of a Synthetic Method for Multifunctionalized Pyrroles Using Isocyanide Dichloride as a Key Intermediate
作者:Takahiro Soeta、Akihiro Matsumoto、Yutaka Ukaji
DOI:10.1021/acs.joc.8b00185
日期:2018.4.20
Multifunctionalized pyrrole derivatives were synthesized using a highly efficient method based on the Michael addition of carbanions generated in situ from isocyanide dichloride to α,β-unsaturated carbonyl compounds. The reactions proceeded smoothly to afford the pyrrole derivatives in good to high yields. A wide range of Michael acceptors, such as α,β-unsaturated carbonyl compounds and nitroolefin