介绍了新型非肽血管紧张素II拮抗剂的合成和体外活性。与以前报道的联苯化合物相比,新的类似物8和9减少了由位阻引起的构象自由度。甲基四′-甲基-2′,6′-二甲氧基[1,1′-联苯基] -2-羧酸酯4是通过将牛至酚与氧代环己烷-2-羧酸酯进行Von Pechmann缩合,然后脱氢而合成的。该方案提供了可能在2-,2'-,4'-和6'-位取代的联苯的碳骨架。取代基的精心制备导致联苯衍生物用于烷基化2-n-丁基-4-氯-5-(羟甲基)咪唑。与咪唑偶联后,分离出两种区域异构体,并通过1 H NMR鉴定。NOESY实验可用于建立具有血管紧张素II阻断活性的最终产物的区域化学。它们对血管紧张素II受体的亲和力是在结合测定实验和离体器官测试中建立的。发现在拮抗剂的联苯部分上2',6'-二甲氧基取代基的存在显着降低了对受体的亲和力。
介绍了新型非肽血管紧张素II拮抗剂的合成和体外活性。与以前报道的联苯化合物相比,新的类似物8和9减少了由位阻引起的构象自由度。甲基四′-甲基-2′,6′-二甲氧基[1,1′-联苯基] -2-羧酸酯4是通过将牛至酚与氧代环己烷-2-羧酸酯进行Von Pechmann缩合,然后脱氢而合成的。该方案提供了可能在2-,2'-,4'-和6'-位取代的联苯的碳骨架。取代基的精心制备导致联苯衍生物用于烷基化2-n-丁基-4-氯-5-(羟甲基)咪唑。与咪唑偶联后,分离出两种区域异构体,并通过1 H NMR鉴定。NOESY实验可用于建立具有血管紧张素II阻断活性的最终产物的区域化学。它们对血管紧张素II受体的亲和力是在结合测定实验和离体器官测试中建立的。发现在拮抗剂的联苯部分上2',6'-二甲氧基取代基的存在显着降低了对受体的亲和力。
A simple and convenient protocol for the synthesis of benzo[c]chromen-6-ones and 3-substitutedisocoumarins through a CuI-catalyzed tandemreaction of 2-bromobenzoates withcyclohexane-1,3-diones or acyclic 1,3-diones is developed. This strategy can also be extended to the one-pot synthesis of isoquinolin-1(2H)-one and 3,4-dihydrophenanthridine-1,6(2H,5H)-dione.
Synthesis of Structurally Diversified Benzo[<i>c</i>]chromene Derivatives under (An)aerobic Conditions Catalyzed by CuI
作者:Fang Dong、Jian‐Quan Liu、Xiang‐Shan Wang
DOI:10.1002/jhet.3666
日期:2019.10
an α‐arylation with cyclohexane‐1,3‐diones to give 1H‐benzo[c]chromene‐1,6(2H)‐diones under Ar atmosphere catalyzed by CuI/l‐proline in the presence of Cs2CO3. The subsequent regioselective oxidation took place under O2 balloon automatically based on the substituents for the construction of structurally diversified benzo[c]coumarin derivatives.
2-溴代苯甲酸与环己烷-1,3-二酮进行α-芳基化反应,在存在CuI / l-脯氨酸的Ar气氛下,在Ar气氛下生成1 H-苯并[ c ] chromene -1,6(2 H)-二酮的Cs 2 CO 3。随后的区域选择性氧化是基于取代基在O 2气囊下自动进行的,用于构建结构多样化的苯并[ c ]香豆素衍生物。
Synthesis of Angular Polycyclic Aromatic Molecules via Rh(III)‐Catalyzed C−H Annulation of Nitrones with Cyclic 2‐Diazo‐1,3‐diones
作者:Yan Wang、Li‐Ming Zhao
DOI:10.1002/adsc.202300720
日期:2023.11.7
We herein disclose a simple and general method for the synthesis of chromendiones through Rh(III)-catalyzed C−H functionalization/annulation reactions of nitrones with cyclic 2-diazo-1,3-diones by using nitrone group as a traceless directing group. This method exhibits high efficiency and broad functional group compatibility. The derivatization of these chromendiones has been also demonstrated to further