Direct synthesis of indazole derivatives <i>via</i> Rh(<scp>iii</scp>)-catalyzed C–H activation of phthalazinones and allenes
作者:Chuanliu Yin、Tianshuo Zhong、Xiangyun Zheng、Lianghao Li、Jian Zhou、Chuanming Yu
DOI:10.1039/d1ob01458g
日期:——
A novel Rh(III)-catalyzed annulation of phthalazinones or pyridazinones with various allenes was developed, leading to the formation of indazole derivatives bearing a quaternary carbon in moderate to good yields. The targeted products were synthesized via sequential C–H activation and olefin insertion, followed by β-hydride elimination and intramolecular cyclization. The synthetic protocol proceeded
开发了一种新型 Rh( III ) 催化的酞嗪酮或哒嗪酮与各种丙二烯的环化反应,从而以中等至良好的产率形成带有季碳的吲唑衍生物。目标产物通过连续的C-H活化和烯烃插入,然后是β-氢化物消除和分子内环化来合成。合成方案有效地进行,具有广泛的官能团耐受性、高原子效率和高Z选择性。通过合成转化证明了该方法的实用性。