硼存在下的6-羟基-5- [2-(萘-1-基)乙基] -3a,5,6,6a-四氢-4 H-吡咯并[3,4- d ]异恶唑-4-酮将三氟化物-乙醚复合物环化为两种非对映异构体混合物的苯并[ f ]异恶唑并[5',4':3,4]-吡咯并[2,1- a ]异喹啉衍生物。对6-羟基-5-(萘-1-基甲基)-3a,5,6,6a-四氢-4 H-吡咯并[3,4- d ]异恶唑-4-酮的类似环化反应得到苯并[de] isoxazolo [ 5′,4′:3,4]吡咯并[2,1- a ]异喹啉作为单一非对映异构体。6-羟基-5- [2-(1(吲哚-3-基)乙基] -6,6a-二氢-3a H-吡咯并[3,4- d ]异恶唑-4(5 HSn(NTf 2)4催化的1)-酮以中等产率提供了异恶唑并[5',4':1,2]吲哚并[8,7-b]吲哚-4(12 H)-。将6-羟基-5- [2-(噻吩-2-基)乙基] -6,6a-二氢-3aH-吡咯并[3
Mn(I)-Catalyzed Preferential Electrophilic C3-Maleimidation in Quinoxaline Leading to Spirocyclization and Dehydrogenation of Succinimides
作者:Subhendu Ghosh、Tamanna Khandelia、Pritishree Panigrahi、Raju Mandal、Bhisma K. Patel
DOI:10.1021/acs.orglett.3c01350
日期:2023.5.26
A Mn(I)-catalyzed site-selective nondirected C3-maleimidation of quinoxaline is established. Herein, the electrophilic C3-metalation precedes over the o-directed strategy to access diversely substituted quinoxaline-appended succinimides. The products undergo PIFA-promoted C(sp2)–C(sp3) spirocyclization via π-electrons drifting from aryls and Selectfluor-mediated dehydrogenation of succinimide at room
Photo-induced 1,2-thiohydroxylation of maleimide involving disulfide and singlet oxygen
作者:Tamanna Khandelia、Subhendu Ghosh、Pritishree Panigrahi、Raju Mandal、Deepjyoti Boruah、Bhisma K. Patel
DOI:10.1039/d3cc03296e
日期:——
visible light-driven di-functionalization of maleimide with disulfide and in situ-generated singletoxygen offers selective 1,2-thiohydroxylation under additive-free conditions. Here the disulfide plays the dual role of photosensitizer and the coupling reagent. Notably, the hydroxyl functionality originates from the in situ generated singletoxygen followed by HAT from H2O (moisture).
可见光驱动的马来酰亚胺与二硫化物和原位产生的单线态氧的双官能化可在无添加剂的条件下提供选择性的 1,2-硫代羟基化。此处二硫化物起到光敏剂和偶联剂的双重作用。值得注意的是,羟基官能团源自原位生成的单线态氧,随后是来自 H 2 O(水分)的 HAT。
Methods and pharmaceutical compositions for the treatment of systemic mastocytosis
申请人:INSERM (INSTITUT NATIONAL DE LA SANTE ET DE LA RECHERCHE MEDICALE)
公开号:US11065230B2
公开(公告)日:2021-07-20
The present invention relates to methods and pharmaceutical compositions for the treatment of systemic mastocytosis. The inventors showed the effect of KPT-251 treatment on SCF-dependent human Mast cell (MC) line without KIT mutation (WT ROSA) and on two factor-independent MC lines with KIT mutations : ROSA Δ 417-419 insY and ROSA D816V. KPT is a Selective Inhibitor of Nuclear Export (SINE) that specifically inhibits the activity of the exportin-1 (XPO1). KPT-251 treatment induces minimal toxicity in non-cancerous hematopoietic cells both in vitro and in vivo. In particular, the present invention relates a method of treating systemic mastocytosis in patient in need thereof comprising administering to the patient a therapeutically effective amount of a XPO1 inhibitor.
A reagent-less sensitizer-free photo-induced access of oxygenated centers via hindered tertiary hydroxylation (Csp3-H) and intramolecular spiro-etherification (Csp3-H/Csp2-H) of photo-responsive C3-maleimidated quinoxaline has been demonstrated. This is an illustrative example of a tautomeric reacting substrate-induced singlet oxygen up-taken divergent photo-oxygenation, guided by the use of a suitable