synthesized via hetero-Diels–Alder reaction related acylation-based tandem processes of 5-(ortho-hydroxybenzylidene)-substituted 4-thioxo-2-thiazolidinones with fumaric and maleic acid derivatives. The structurally similar rel-(5aR,5R,11bR) derivatives were synthesized via domino reaction of isorhodanine and (2E)-4-(2-formylphenoxy)but-2-enoates. The stereochemistry of cycloadditions was confirmed by
Arylidene Pyruvic Acids Motif in the Synthesis of New 2<i>H</i>,5<i>H</i>-Chromeno[4′,3′:4,5]thiopyrano[2,3-<i>d</i>]thiazoles via Tandem Hetero-Diels–Alder-Hemiacetal Reaction
作者:Andrii Lozynskyi、Borys Zimenkovsky、Andrzej K. Gzella、Roman Lesyk
DOI:10.1080/00397911.2015.1076004
日期:2015.10.2
reaction using arylidene pyruvic acids with 5-(ortho-hydroxybenzylidene)-substituted 4-thioxo-2-thiazolidinones, leading to 6-hydroxy-2-oxo-5-phenyl-3,5a,6,11b-tetrahydro-2H,5H-chromeno[4′,3′:4,5]thiopyrano[2,3-d][1,3]thiazole-6-carboxylic acids. The stereochemistry of cycloaddition was confirmed by NMR spectra and a single-crystal x-ray diffraction analysis. GRAPHICAL ABSTRACT
摘要 我们开发了一种使用亚芳基丙酮酸与 5-(邻-羟基苯亚甲基)-取代的 4-硫代-2-噻唑烷酮的串联杂-Diels-Alder-半缩醛反应,产生 6-羟基-2-氧代-5-苯基- 3,5a,6,11b-四氢-2H,5H-色基[4',3':4,5]噻唑并[2,3-d][1,3]噻唑-6-羧酸。环加成的立体化学通过核磁共振谱和单晶 X 射线衍射分析得到证实。图形概要
Tandem hetero-Diels–Alder-hemiacetal reaction in the synthesis of new chromeno[4′,3′:4,5]thiopyrano[2,3-<i>d</i>]thiazoles
作者:Andrii Lozynskyi、Vasyl Matiychuk、Olexandr Karpenko、Andrzej K. Gzella、Roman Lesyk
DOI:10.1515/hc-2016-0176
日期:2017.2.1
Abstract Novel rel-(5aR,6R,11bS)-6-hydroxy-3,5a,6,11b-tetrahydro-2H,5H-chromeno[4′,3′:4,5]thiopyrano[2,3-d][1,3]thiazole-2-ones were synthesized via tandem hetero-Diels-Alder-hemiacetal reaction of 5-(2-hydroxybenzylidene)-4-thioxo-2-thiazolidinones and α,β-unsaturated aldehydes. The stereochemistry of cycloadditions was confirmed by NMR spectra and a single crystal X-ray diffraction analysis.
摘要 新型rel-(5aR,6R,11bS)-6-hydroxy-3,5a,6,11b-tetrahydro-2H,5H-chromeno[4',3':4,5]thiopyrano[2,3-d] [1,3] thiazole-2-ones 是通过 5-(2-hydroxybenzylidene)-4-thioxo-2-thiazolidinones 和 α,β-不饱和醛的串联杂-Diels-Alder-半缩醛反应合成的。通过核磁共振谱和单晶 X 射线衍射分析证实了环加成的立体化学。
Thiopyrano[2,3-d]thiazole structures as promising scaffold with anticancer potential
Seven chromeno[4′,3':4,5]thiopyrano[2,3-d]thiazolederivatives were synthesized and screened for their cytotoxic effects on different lines of mammalian leukemia, breast adenocarcinoma, glioblastoma, and pseudo-normal and normal cells. The derivative3 demonstrated toxicity towards tumor cells of Jurkat, K562, U251, HL-60, MCF-7, and MDA-MB-231 lines. At the same time, this compound possessed low toxicity
Crotonic, cynnamic, and propiolic acids motifs in the synthesis of thiopyrano[2,3-d][1,3]thiazoles via hetero-Diels–Alder reaction and related tandem processes
Various novel thiopyrano[2,3-d][1,3]thiazol-2-one-6-carboxylic acids derivatives were synthesized in 54-86% yields via hetero-Diels Alder reactions and related acylation-based tandem processes of 5-arylidene-4-thioxo-2-thiazolidinones with crotonic, propiolic, and cynnamic acids derivatives. Stereo- and regioselectivity of cycloaddition were investigated. (C) 2013 Elsevier Ltd. All rights reserved.