Three-component, one-pot synthesis of benzo[6,7]cyclohepta[1,2- b ]pyridine derivatives under catalyst free conditions and evaluation of their anti-inflammatory activity
An efficient three-component protocol is described for the synthesis of benzo[6,7]cyclohepta[1,2-b]pyridine derivatives using β-chloroacroleins, 1,3-dicarbonyls and ammonium acetate under catalyst free conditions by using ethanol as reaction media. The mild reaction conditions, operational simplicity and high yields are the advantages of this protocol and the broad scope of this one-pot reaction makes
描述了一种有效的三组分方案,该方案用于在无催化剂条件下使用乙醇作为反应,使用β-氯丙烯醛,1,3-二羰基和乙酸铵合成苯并[6,7]环庚[1,2- b ]吡啶衍生物媒体。温和的反应条件,操作简便和高收率是该方案的优点,并且这种一锅法反应的广泛范围使该方法在实际应用中很有希望。筛选所有最终化合物的抗炎活性。在测试的化合物中,化合物5a,5b,5c,5d,5f和5k 表现出对IL-1β和MCP-1分泌的显着抑制,以此作为抗炎活性的指标。
Design, synthesis and in vitro anti-tuberculosis activity of benzo[6,7]cyclohepta[1,2- b ]pyridine-1,2,3-triazole derivatives
designed and synthesized in excellent yields by Huisgen’s [3+2] cyclo addition reaction of 3-(azidomethyl)-2-methyl-6,7-dihydro-5H-benzo[6,7]cyclohepta[1,2-b]pyridine (5) with various alkynes 6 in presence of copper sulphate and sodium ascorbate and their structures were confirmed by IR, 1H NMR, 13C NMR and HRMS. The newly synthesized compounds 7a–j & 8a–j were evaluated for their in vitro anti-mycobacterial
Huisgen [3+]设计并合成了一系列新颖的苯并[6,7]环庚[1,2 - b ]吡啶-1,2,3-三唑杂种(7a–j和8a–j)。 2]的3-(叠氮基甲基)环加成反应-2-甲基-6,7-二氢-5- ħ -苯并[6,7]环庚并[1,2- b ]吡啶(5)具有在存在各种炔6硫酸铜和抗坏血酸钠及其结构通过IR,1 H NMR,13 C NMR和HRMS确认。对新合成的化合物7a–j和8a–j进行了体外评估抗结核分枝杆菌H37Rv(ATCC 27294)的抗分枝杆菌活性。在测试的化合物中,化合物7i和8g表现出最强的活性,MIC值为1.56 µg / mL,细胞毒性较低。
Iridium/f-Amphol-catalyzed Efficient Asymmetric Hydrogenation of Benzo-fused Cyclic Ketones
作者:Congcong Yin、Xiu-Qin Dong、Xumu Zhang
DOI:10.1002/adsc.201800839
日期:2018.11.16
Iridium/f‐Amphol‐catalyzedasymmetrichydrogenation of various benzo‐fused five to seven‐membered cyclic ketones was successfully developed, affording a series of chiral benzo‐fused cyclic alcohols with excellent results (75%–99% yields, 93%–>99% ee, and TON up to 297 000). The enantioenriched products can be employed as key intermediates or motifs for the synthesis of some important biologically active
A novel approach for the synthesis of β-keto esters: one-pot reaction of carboxylic acids with chlorosulfonyl isocyanate
作者:Ufuk Atmaca
DOI:10.24820/ark.5550190.p011.209
日期:——
esters were synthesized by direct carboxylation of various 4and 5-oxo-carboxylic acid derivatives in the presence of chlorosulfonyl isocyanate in excellent yield under mild conditions. Additionally, optimization conditions were examined for synthesis β-keto esters. Finally, it has been found that trifluoroacetic acid is efficient in DCM under optimized conditions. This efficient one-pot novel method
Synthesis of 2,3-Benzotropones via Palladium(II)-Catalyzed Aerobic Dehydrogenation from 1-Benzosuberones and Sequential Diels–Alder Reaction to Yield Benzobicyclo[3.2.2]nonenones
作者:Hyung-Seok Yoo、Jeong-Won Shin、Yoon Hu Jang、Yo-Sep Yang、Seung Hwan Son、Hyuck-Jae Won、Soo Lim Kim、Jaehoon Sim、Nam-Jung Kim
DOI:10.1021/acs.joc.3c02558
日期:2024.3.1
An approach to 2,3-benzotropone from 1-benzosuberone via palladium(II)-catalyzed aerobic dehydrogenation was developed. This method first provided a catalytic route to various 2,3-benzotropones from their corresponding 1-benzosuberones in good yields. In addition, the reaction could be applied to a one-pot Diels–Alderreaction with maleimide, providing a complex benzobicyclo[3.2.2]nonenone in ≤90%
开发了一种通过钯 (II) 催化有氧脱氢从 1-苯并环庚酮生产 2,3-苯并托酮的方法。该方法首先提供了从相应的 1-苯并环庚酮制备各种 2,3-苯并环酮的催化路线,且产率良好。此外,该反应可应用于与马来酰亚胺的一锅狄尔斯-阿尔德反应,以≤90%的产率提供复杂的苯并双环[3.2.2]壬烯酮。还进行了支持我们提出的机制的动力学分析,强调了所开发的合成途径的稳健性。