An efficient coupling of N-tosylhydrazones with 2-halopyridines: synthesis of 2-α-styrylpyridines endowed with antitumor activity
作者:Marie Lawson、Abdallah Hamze、Jean-François Peyrat、Jérôme Bignon、Joelle Dubois、Jean-Daniel Brion、Mouad Alami
DOI:10.1039/c3ob40263k
日期:——
The synthesis of 2-α-styrylpyridines has been carried out by using the coupling of polyoxygenated N-tosylhydrazones with various 2-halopyridines. We demonstrated that the use of a catalytic amount of PdCl2(MeCN)2 in combination with a bidentate ferrocene DPPF or a monodentate alkyl phosphine tBu2MeP-HBF4 constitutes an efficient protocol for this coupling, providing 2-α-styrylpyridines 2 in satisfactory to good yields. Among several polyoxygenated derivatives 2 evaluated, compound 2aa was found to exhibit excellent antiproliferative and antimitotic activities comparable to that of the reference compound isoCA-4.
通过利用多氧化的N-对甲苯磺酰腙与各种2-卤代吡啶的偶联反应,已经实现了2-α-苯乙烯基吡啶的合成。我们证明了使用催化量的PdCl2(MeCN)2配合双齿的二茂铁基DPPF或单齿的烷基膦tBu2MeP-HBF4构成了一种高效的偶联反应方案,能够提供令人满意的至良好的产率的2-α-苯乙烯基吡啶2。在评估的几个多氧化衍生物2中,化合物2aa被发现具有与参考化合物isoCA-4相媲美的优异的抗增殖和抗有丝分裂活性。