A nanoscale iron catalyst for heterogeneous direct <i>N</i>- and <i>C</i>-alkylations of anilines and ketones using alcohols under hydrogen autotransfer conditions
作者:Madhu Nallagangula、Chandragiri Sujatha、Venugopal T. Bhat、Kayambu Namitharan
DOI:10.1039/c9cc04120f
日期:——
report a commercially available nanoscale Fe catalyst for heterogeneous direct N- and C-alkylation reactions of anilines and methyl ketones with alcohols. A hydrogen autotransfer mechanism has been found to operate in these reactions by deuterium labelling studies. In addition, dehydrogenative quinoline synthesis has been demonstrated from amino benzyl alcohols and acetophenones.
NAE1-Ubc12-Cullin1 NEDDylation via interacting with NAE1 directly. Furthermore, the activation of NEDDylation resulted in the degradation of inhibitor of apoptosis proteins (IAPs). Importantly, Ⅶ-31 inhibited tumor growth in xenograft models in vivo without the apparent toxicity. In summary, it is the first time to reveal that Ⅶ-31 deserves consideration for cancer therapy as a NEDDylation activator.
spiro[thieno-oxindoles] were rearranged under acidic conditions into thieno[2,3-c]quinolin-4-ones, involving an interesting dienone–phenol-like mechanism. The transformation of 2-furylcarbinols into spiro[pentenone-oxindoles] seems to be the first stepwise C-Piancatelli rearrangement. The spirooxindole products were biologically evaluated, and some of them showed promising cytotoxic activities against DU145 and
One‐Pot Cascade Transformation of Glucal into Structurally Diverse Drug‐Like Scaffolds
作者:Hui Yao、Ronny Willam、Siming Wang、Jingxi He、Tai Guo、Xue‐Wei Liu
DOI:10.1002/asia.201900844
日期:2019.11.18
A diversity-oriented synthesis strategy to produce threetypes of structurally drug-like N-heterocyclic-fused rings has been developed from abundant biomass-derived d-glucal, aniline and water in a stereoselective manner. The overall transformation which entails a cascade of Ferrier reaction and 4π conrotatory imino-Nazarov cyclization was performed in one-pot allowing convenient preparation of scaffolds
In(OTf)<sub>3</sub>-Catalyzed Synthesis of 2,3-Dihydro-1<i>H</i>-benzo[<i>e</i>]indoles and 2,3-Dihydrobenzofurans via [3 + 2] Annulation
作者:Shuxuan Liu、Yu Zang、Hai Huang、Jianwei Sun
DOI:10.1021/acs.orglett.0c02729
日期:2020.11.6
An In(OTf)3-catalyzed intermolecular [3 + 2] annulation for the synthesis of 2,3-dihydro-1H-benzo[e]indoles and 2,3-dihydrobenzofurans from readily available substrates has been achieved. This approach takes advantage of oxetane and para-quinone methide as important functional units in the key intermediate. β-Naphthylamines and phenols have been demonstrated as excellent reaction partners.
已实现了一种由In(OTf)3催化的分子间[3 + 2]环合反应,用于从易于获得的底物中合成2,3-二氢-1 H-苯并[ e ]吲哚和2,3-二氢苯并呋喃。该方法利用氧杂环丁烷和对苯二甲酰甲烷作为关键中间体中的重要功能单元。β-萘胺和苯酚已被证明是极好的反应伴侣。