Copper-Promoted 6-<i>endo-trig</i> Cyclization of β,γ-Unsaturated Hydrazones for the Synthesis of 1,6-Dihydropyridazines
作者:Yong-Qiang Guo、Mi-Na Zhao、Zhi-Hui Ren、Zheng-Hui Guan
DOI:10.1021/acs.orglett.8b01240
日期:2018.6.1
A novel and efficient strategy for the synthesis of 1,6-dihydropyridazines via copper-promoted 6-endo-trig cyclization of readily available β,γ-unsaturated hydrazones have been developed. A series of 1,6-dihydropyridazines have been synthesized by this method with good yields, high functional group tolerance, and remarkable regioselectivity under mild conditions. Importantly, the 1,6-dihydropyridazines
已经开发了通过铜促进的6 - β-内-trig环化容易获得的β,γ-不饱和酮合成1,6-二氢哒嗪的新颖而有效的策略。通过该方法合成了一系列1,6-二氢哒嗪,具有良好的收率,较高的官能团耐受性以及在温和条件下的显着区域选择性。重要的是,在NaOH的存在下,可以将1,6-二氢哒嗪有效地转化为生物学上重要的哒嗪。