Design, Synthesis, and
<i>in vitro</i>
Evaluation of Tubulin‐Targeting Dibenzothiazines with Antiproliferative Activity as a Novel Heterocycle Building Block
作者:Walter D. Guerra、Daniel Lucena‐Agell、Rafael Hortigüela、Roberto A. Rossi、J. Fernando Díaz、José M. Padrón、Silvia M. Barolo
DOI:10.1002/cmdc.202100383
日期:2021.10.6
series of free NH and N-substituted dibenzonthiazines with potential anti-tumor activity from N-aryl-benzenesulfonamides. A biological test of synthesized compounds (59 samples) was performed in vitro measuring their antiproliferative activity against a panel of six human solid tumor cell lines and its tubulin inhibitory activity. We identified 6-(phenylsulfonyl)-6H-dibenzo[c,e][1,2]thiazine 5,5-dioxide
我们从N-芳基苯磺酰胺中制备了一系列具有潜在抗肿瘤活性的游离 NH 和N-取代的二苯并噻嗪。在体外对合成的化合物(59 个样品)进行了生物学测试,测量了它们对一组六种人类实体肿瘤细胞系的抗增殖活性及其微管蛋白抑制活性。我们鉴定了 6-(苯磺酰基)-6 H-二苯并[ c , e ][1,2]噻嗪 5,5-二氧化物和 6-甲苯磺酰基-6 H-二苯并 [ c , e][1,2]噻嗪 5,5-二氧化物是具有良好活性值的最佳化合物(总体范围为 2–5.4 μM)。在此,我们报告了二苯并噻嗪核心作为具有抗增殖活性的新型构件,针对微管蛋白动力学。
Synthesis of 2<i>H</i>-1,2-Benzothiazine 1,1-Dioxides via Heteroannulation Reactions of 2-Iodobenzenesulfonamide with Ketone Enolates under S<sub>RN</sub>1 Conditions
作者:William J. Layman,、Thomas D. Greenwood、Aaron L. Downey、James F. Wolfe
DOI:10.1021/jo050964e
日期:2005.11.1
reaction to the preparation of 2H-1,2-benzothiazin-3(4H)-one 1,1-dioxides 3 (R = H, Ph) through reactions of 1a with tert-butyl acetate and ethyl phenylacetate enolates resulted only in hydrodehalogenation of 1a. However, oxazoline anion 30, a syntheticequivalent of ethyl phenylacetate, was successfully employed in an alternative SRN1-based synthesis of benzothiazine 3 (R = Ph).
2-碘苯磺酰胺(1a)在液态NH 3中与衍生自丙酮,频哪酮,丁酮和3-甲基-2-丁酮的烯醇钾进行光刺激的S RN 1反应,以公平地获得良好的2 H -1,2-收率。苯并噻嗪1,1-二氧化物2。发现1a的还原脱卤作用在1a与3-戊酮,2-甲基-3-戊酮和2,4-二甲基-3-戊酮的光诱导反应中占主导地位,还原程度与β-氢原子数量成正比。酮烯醇中存在的原子。2,4-二甲基-3-戊酮-d 14(24的同位素标记研究)证实了β-氢在还原过程中的主要作用。的反应1A与环戊酮,环己酮,并得到新的三环苯并噻嗪衍生物环辛烯醇化物26 - 29。尝试通过1a与乙酸叔丁酯和乙酸乙酯的反应将杂环化反应扩展到制备2 H -1,2-苯并噻嗪-3(4 H)-1 1,1-二氧化物3(R = H,Ph)苯乙酸烯醇盐仅导致1a的加氢脱卤。但是,恶唑啉阴离子30(苯乙酸乙酯的合成当量)已成功用于替代S基于RN 1的苯并噻嗪3的合成(R
Expeditious Synthesis of 3,4-Dihydro-2H-1.LAMBDA.6-benzo(e)(1,2)thiazine 1,1-Dioxides.
A novel pathway for the preparation of 3, 4-dihydro-2H-1λ6-benzo[e][1, 2]thiazine 1, 1-dioxides 3 via an orthomethyl lithiation/cyclization reaction of N-acyl-o-toluenesulfonamides 5 is reported. Readily available N-acyl-o-toluenesulfonamides 5 were treated with 2 eq of n-BuLi at -78°C-0°C to give the corresponding sultams 6 in moderate to good yields. The resulting sultams 6 were converted to saturated sultams 3, which can be considered as one carbon-extended homologues of the Oppolzer sultams 1, in high yields by hydrogenation. Studies on the scope and limitation of this annulation for the preparation of sultams are discussed. Demonstration of the feasibility of using the sultams 3 templates for an electorophilic fluorinating agent is also described.