4′-Alkoxyl substitution enhancing the anti-mitotic effect of 5-(3′,4′,5′-substituted)anilino-4-hydroxy-8-nitroquinazolines as a novel class of anti-microtubule agents
摘要:
Mitosis inhibitors are powerful anticancer drugs. Based on a novel anti-microtubule agent of 5-(4'-methoxy)anilino-4-hydroxy-8-nitroquinazoline, a series of 5-(3',4',5'-substituted)anilino-4-hydroxy-8- nitroquinazolines were designed and synthesized to investigate the effect of the substitution on the inhibitory activity against mitotic progression of tumor cells. The large alkoxyl substitution on the 4'-position of 5-anilino ring is beneficial for the potency. The 5-(3',4,5'-trimethoxy)anilino-8-nitroquinazoline (1h) displays an overwhelming activity in arresting the cells at the G2/M phase, providing a promising new template for further development of potent microtubule-targeted anti-mitotic drugs. (c) 2006 Elsevier Ltd. All rights reserved.
Copper Catalyzed sp<sup>3</sup> C–H Etherification with Acyl Protected Phenols
作者:Tolani K. Salvador、Charles H. Arnett、Subrata Kundu、Nicholas G. Sapiezynski、Jeffery A. Bertke、Mahdi Raghibi Boroujeni、Timothy H. Warren
DOI:10.1021/jacs.6b09057
日期:2016.12.28
A variety of acyl protected phenols AcOAr participate in sp3 C-H etherification of substrates R-H to give alkyl aryl ethers R-OAr employing tBuOOtBu as oxidant with copper(I) β-diketiminato catalysts [CuI]. Although 1°, 2°, and 3° C-H bonds may be functionalized, selectivity studies reveal a preference for the construction of hindered, 3° C-OAr bonds. Mechanistic studies indicate that β-diketiminato
MCM-41-immobilized 1,10-phenanthroline–copper(<scp>i</scp>) complex: a highly efficient and recyclable catalyst for the coupling of aryl iodides with aliphatic alcohols
作者:Yang Lin、Mingzhong Cai、Zhiqiang Fang、Hong Zhao
DOI:10.1039/c6ra19825b
日期:——
A heterogeneous C–O coupling reaction between aryl iodides and aliphatic alcohols was achieved in neat alcohol or toluene at 110 °C in the presence of 10 mol% of the MCM-41-immobilized 1,10-phenanthroline–copper(I) complex [MCM-41-1,10-phen–CuI] with Cs2CO3 as a base, yielding a variety of aryl alkyl ethers in good to excellent yields. The new heterogeneous copper catalyst can easily be prepared by
在存在10 mol%的MCM-41固定的1,10-菲咯啉-铜(I)络合物的存在下,在110°C的纯醇或甲苯中,芳基碘化物和脂肪醇之间的异质C-O偶联反应得以实现[以Cs 2 CO 3为碱的MCM-41-1,10-phen-CuI] ,可产生各种芳基烷基醚,收率好至极佳。新的多相铜催化剂可以很容易地通过简单的方法由市售和廉价的试剂制备,并通过过滤反应溶液进行回收并循环至少8次而不会显着降低活性。
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作者:
DOI:——
日期:——
Sawgowdnii, Zhurnal Obshchei Khimii, 1952, vol. 22, p. 1995; engl. Ausg. S. 2045
作者:Sawgowdnii
DOI:——
日期:——
IMIDAZO[1,2-A]PYRIDINE DERIVATIVES AND THEIR USE AS POSITIVE ALLOSTERIC MODULATORS OF MGLUR2 RECEPTORS