设计并合成了一类新型的(2E)-(2-氧代-1,2-二氢-3 H-吲哚-3-亚烷基)乙酸酯衍生物,作为有效的抗增殖剂。这些化合物大多数对某些肿瘤细胞系(包括SK-BR-3,MDA-MB-231,HCT-116,SW480,Ovcar-3,HL-60,Saos-2和HepG2)显示出有效的抗增殖活性。化合物8c和11h被认为是最有效的化合物,而HL-60,HCT116和MDA-MB-231是最敏感的细胞系。机理研究表明,化合物8c通过抑制TrxR增强活性氧的水平,然后通过激活HCT116细胞中的凋亡蛋白,bax和Caspase 3来诱导凋亡。SAR的初步分析表明,双键和酯基的修饰对抗增殖活性有很大影响。我们的发现表明,值得进一步研究(2E)-(2-oxo-1,2-dihydro-3 H -indol-3-ylidene)acetate的抗肿瘤效力。
设计并合成了一类新型的(2E)-(2-氧代-1,2-二氢-3 H-吲哚-3-亚烷基)乙酸酯衍生物,作为有效的抗增殖剂。这些化合物大多数对某些肿瘤细胞系(包括SK-BR-3,MDA-MB-231,HCT-116,SW480,Ovcar-3,HL-60,Saos-2和HepG2)显示出有效的抗增殖活性。化合物8c和11h被认为是最有效的化合物,而HL-60,HCT116和MDA-MB-231是最敏感的细胞系。机理研究表明,化合物8c通过抑制TrxR增强活性氧的水平,然后通过激活HCT116细胞中的凋亡蛋白,bax和Caspase 3来诱导凋亡。SAR的初步分析表明,双键和酯基的修饰对抗增殖活性有很大影响。我们的发现表明,值得进一步研究(2E)-(2-oxo-1,2-dihydro-3 H -indol-3-ylidene)acetate的抗肿瘤效力。
Catalytic Generation of Donor-Acceptor Cyclopropanes under <i>N</i>
-Heterocyclic Carbene Activation and their Stereoselective Reaction with Alkylideneoxindoles
作者:Liher Prieto、Eduardo Sánchez-Díez、Uxue Uria、Efraím Reyes、Luisa Carrillo、Jose L. Vicario
DOI:10.1002/adsc.201700198
日期:2017.5.17
Formylcyclopropanes undergo activation in the presence of an N‐heterocyclic carbene catalyst generating a donor‐acceptorcyclopropane intermediate with the ability to undergo ring‐opening followed by formal [4+2] cycloaddition with alkylideneoxindoles. This enables the direct enantio‐ and diastereoselective synthesis of tetrahydropyrano[2,3‐b]indoles through the use of a chiral NHC catalyst.
甲酰基环丙烷在N杂环卡宾催化剂的存在下发生活化,生成供体-受体环丙烷中间体,该中间体具有开环能力,然后与亚烷基亚氧吲哚进行正式的[4 + 2]环加成反应。这样可以通过使用手性NHC催化剂直接对映和非对映选择性合成四氢吡喃并[2,3- b ]吲哚。
Asymmetric Synthesis of Tetrahydroindolizines by Bimetallic Relay Catalyzed Cycloaddition of Pyridinium Ylides
A highlyenantioselectivesynthesis of tetrahydroindolizines by catalytic multicomponent cycloaddition reactions of diazoacetate, pyridine, and alkenyloxindole was developed. Under the relay catalysis, involving an achiral iron(III) catalyst and chiral N,N′‐dioxide‐scandium(III) complex, a series of tetrahydroindolizines bearing different substituents were obtained in moderate to high yields (up to
Asymmetric Synthesis of Spirooxindoles with Seven Stereocenters via Organocatalyzed One‐pot Three‐component Sequential Cascade Reactions
作者:Bo‐Liang Zhao、Da‐Ming Du
DOI:10.1002/adsc.201900218
日期:2019.7.11
three‐component Michael/Mannich‐Michael/cyclization sequential cascade reaction for the construction of bispirooxindole‐spirooxindoles was developed in good yields with excellent stereoselectivities (up to >20:1 dr, 99% ee). A series of original cinnamoyl‐3‐ylideneoxindoles have been applied to this sequential cascade strategy for the first time. This new strategy provides a process for the enantioselective construction
Synthesis of Spiro[pyrazolin-3,3′-oxindoles] and 3-Arylcarbonylmethyl Substituted Ylideneoxindoles by 1,3-Dipolar Cycloadditions of 3-Ylideneoxindoles and In-Situ-Generated α-Diazoketones
An efficient 1,3-dipolarcycloaddition of 3-ylideneoxindoles with in-situ-generated α-diazoketones to potentially biological active spiro[pyrazolin-3,3′-oxindoles] 4 with excellent regioselectivity and diastereoselectivity and synthetically useful building block 3-arylcarbonylmethyl substituted ylideneoxindoles 5 in different conditions has been developed. This method has advantages of mild conditions
A highly efficient enantioselective dicarbofunctionalization reaction of (E)-alkenyloxindoles with pyridinium salts was realized. The process includes the chiral N,N′-dioxide–Sc(III) complex-catalyzed regio-, diastereo-, and enantioselective [3+2] cycloaddition reaction and the following photo-promoted aza-Norrish II type rearrangement. A series of 2-pyridyl substituted oxindole derivatives were obtained