Silicon-assisted O-heterocyclic synthesis: mild and efficient one-pot syntheses of (E)-3-arylideneflavanones, coumarin-3-carbonitriles/ carboxamides, and benzannulated spiropyran derivatives
作者:Tarek A. Salama、Mohamed A. Ismail、Abdel-Galil M. Khalil、Saad S. Elmorsy
DOI:10.3998/ark.5550190.0013.921
日期:——
one-pot synthesis of ( E )-benzylideneflavanones, dibenzospiropyrans and coumarin-3-carbonitriles/carboxamides is achieved through tandem aldol-cyclocondensation of o -hydroxyaryl carbonyl compounds with aryl aldehydes or enolisable ketones or through Knoevenagel reaction by the aid of SiCl 4 /EtOH at ambient temperature. Keywords: O-Heterocycles, tetrachlorosilane-ethanol, one-pot synthesis, cyclocondensation
Tumor suppressive activities of solvatochromic 3,3′‐azadimethylene dinaphthospiropyran in colon cancer model
作者:Pallavi Lagisetty、Venkateswararao Eeda、Vivek R. Yadav、Susan L. Nimmo、Dharmalingam Subramaniam、Douglas R. Powell、Vibhudutta Awasthi
DOI:10.1111/cbdd.13785
日期:2021.2
investigated because of their thermo‐ and photochromic characteristics, but their biotherapeutic properties have not been explored much. We report anti‐proliferative properties of a novel 3,3′‐azadimethylene dinaphthospiropyran 11. Dibenzospiropyrans and dinaphthospiropyrans were synthesized by a simple and expedient method using acid‐catalyzed aldolcondensation of salicylaldehyde and 2‐hydroxy‐1‐naphthaldehyde
This study is the first report on the anticancer activity of spirobibenzopyrans, an unexplored class of therapeutic agents.
这项研究是关于未被开发利用的一类治疗剂——螺环联苯吡喃类化合物的抗癌活性的首次报告。
[EN] SPIROBIBENZOPYRANS AND ANALOGUES AS MULTITHERAPEUTIC AGENTS<br/>[FR] SPIROBIBENZOPYRANES ET ANALOGUES EN TANT QU'AGENTS MULTITHÉRAPEUTIQUES
申请人:KAR SWAYAMSIDDHA
公开号:WO2018229665A1
公开(公告)日:2018-12-20
The present invention relates to novel spirobibenzopyran conjugate derivatives with potent anti- cancer activity as pharmaceutical agents, their stereoisomers, their polymorphs and their pharmaceutically acceptable salts and their pharmaceutically acceptable solvates or mixtures thereof. The novel derivatives of spirobebenzopyrans have the general formula (I). The spirobibenzopyran derivatives represented by general formula (I) defined above of the present invention are useful for treating cancer and other proliferative diseases. The anticancer activity exhibited may be through cytotoxic activity, anti-proliferation, cell cycle kinase inhibition or may be through cell differentiation. The present invention also relates to pharmaceutical compositions containing compounds of general formula (I) or their stereoisomers, their polymorphs and their pharmaceutically acceptable salts and their pharmaceutically acceptable solvates.
Unexpected spiro cyclic products were obtained from the popular alkali catalyzed Claisen-Schmidt reaction of ketones with salicylaldehyde apart from the bis-chalcones. However, in the acid catalyzed reaction, we observe their transformation to a benzopyrylium salt. In the present study, we demonstrate this phenomenon for three ketones namely cyclopentanone, cylcohexanone and cylcoheptanone. Each of
不可思议的螺环产物是由除双查耳酮以外的流行的碱催化酮与水杨醛的Claisen-Schmidt反应获得的。但是,在酸催化的反应中,我们观察到它们转化为苯并吡啶盐。在本研究中,我们证明了对于三种酮,即环戊酮,环己酮和环庚酮这一现象。使用UV-Vis,FT-IR,1 H NMR,13对表征的每种相应产物进行表征1 H NMR和质谱。此外,由环庚庚酮反应物合成的螺线分子的结构已通过X射线晶体学测定,并使用TGA / DTA技术对其热性质进行了进一步研究。为了使这种现象合理化,我们首先研究了溶剂对反应的影响,并进一步探讨了路易斯酸催化剂和各种溶剂在相同反应条件下的影响。此外,我们已对计算机进行了评估,热力学参数(如熵)的影响。在这方面,我们探讨了双查耳酮,螺分子和苯并吡啶盐之间的关系。因此,研究了从环戊酮到环庚酮的扩环作用。总之,我们提出了合成的螺双联苯并吡喃和苯并吡啶盐的抗菌潜力。