A highly regiospecific synthesis of a series of indenoindoles is reported, together with X-ray studies and their activity against human prostate cancer cells PC-3 and LNCaP in vitro. The most effective compound 7,7-dimethyl-5-[(3,4-dichlorophenyl)]-(4bRS,9bRS)-dihydroxy-4b,5,6,7,8,9bhexahydro-indeno[1,2-b]indole-9,10-dione 7q reduced the viability in both cell lines in a time and dose-dependent manner
organocatalysis from commonly used o-hydroxystyrenes undergo enantioselective cyclization with dimedone-derived enaminones, to form biologically important tetrahydroxanthenes in high yields and good enantioselectivities (up to 88% yield, 95:5 er). The reaction proceeds in chlorobenzene in the presence of a chiral phosphoric acid (CPA) at 110 °C. The reaction scope with regard to various ring-substituted o-hydroxystyrenes
A new series of β-enaminocarboxamide was synthesized via the addition of chlorosulfonyl isocyanate to β-enaminones. The prepared intermediates were converted to corresponding β-enaminocarboxamides by removal of the chlorosulfonyl group using methanol. The resulting compounds were obtained in excellent yields in the range of (80–92%) and were characterized by 1H, 13C, HMBC, HSQC NMR spectroscopy, and
interesting new compounds using both microwave heating and heterogeneous non-toxic catalysts is acknowledged as a green approach that avoids many classical chemistry-related problems. In the current study, β-enaminones were used as precursors to the synthesis of modified 4-hydroxy-2-quinolone analogues. The synthesis was monitored in a benign way undermicrowaveirradiation and was catalyzed by bismuth chloride
传统的化学合成涉及使用危险的方案、危险的溶剂以及有毒的产品和催化剂,被认为不环保且对人类健康有害。考虑到其众多缺点,用更安全、更环保、在时间和选择性方面更有效的绿色化学替代传统化学变得至关重要。使用微波加热和非均相无毒催化剂来制定合成方案来生产有趣的新化合物被认为是一种绿色方法,可以避免许多经典的化学相关问题。在当前的研究中,β-烯胺酮被用作合成修饰的4-羟基-2-喹诺酮类似物的前体。合成过程在微波辐射下以良性方式进行监测,并由 20 mol% 量的氯化铋 III 催化。该方法的优点是使用无腐蚀、无毒、低成本且可用的铋路易斯酸催化剂,这使其更符合绿色化学的要求。合成的化合物以中等至良好的产率(51-71%)获得,并通过1 H、13 C NMR、IR 光谱以及元素分析进行了表征。使用X射线衍射方法对化合物5i进行了完整的结构解析,结果表明获得了烯醇互变异构形式。
Formal synthesis of 10‐Hydroxy‐6‐Aryldibenzo[b,g][1,8]Naphthyridin‐11(6H)‐ones from 2‐chloroquinolin‐3‐carbaldehydes and 3‐(Arylamino)cyclohexenones
作者:Han‐Joo Lee、Joo‐Hyun Jeon、Jin‐Hee Kim、Hitesh B. Jalani、Jin‐Hyun Jeong
DOI:10.1002/jhet.4799
日期:2024.5
We have described herein a simple and formal synthesis of 10-Hydroxy-6-Aryldibenzo[b,g][1,8]naphthyridin-11(6H)-ones from 2-chloroquinolin-3-carbaldehydes and 3-(Arylamino)cyclohexenones. This protocol provides the formation of four rings including 1,8-naphthyridin under the mild conditions. Furthermore, the cyclohexanone part of the enaminone undergoes air oxidation provided the phenol ring is attached