Gallium(III) triiodide catalyzed conjugate addition of indoles with α,β-unsaturated ketones
作者:Zhi-Hao Huang、Jian-Ping Zou、Wen-Qing Jiang
DOI:10.1016/j.tetlet.2006.08.108
日期:2006.11
Reactions of indoles and α,β-unsaturated ketones could be effectively catalyzed by using 10 mol % galliumtriiodide to give the corresponding Michael adducts in good to excellent yields.
Antimony Trichloride–Catalyzed Michael Addition of Indoles to the α,β‐Unsaturated Ketones
作者:Gourhari Maiti、Pradip Kundu
DOI:10.1080/00397910701410749
日期:2007.7
Abstract Indoles undergo conjugate addition with α,β‐unsaturated ketones in the presence of a catalytic amount of antimonytrichloride under refluxing condition to afford the corresponding Michael adduct in excellent yields. The substitution on the indole ring occurred exclusively at 3‐position without a trace of any N‐alkylated products.
Abstract A novel method for the Michael reaction of indoles to α,β‐unsaturatedketones catalyzed by acidic ionic liquid is reported. We obtained the corresponding products in excellent yields in the presence of [hmim]HSO4. Development of this method has resulted in a new protocol for the synthesis of β‐indolylketones.
Regioselective switching approach for the synthesis of α and δ carboline derivatives
作者:Tang-Hao Yang、Chun-Wei Kuo、Veerababurao Kavala、Ashok Konala、Chia-Yu Huang、Ching-Fa Yao
DOI:10.1039/c6cc09468f
日期:——
A metal-free protocol for accessing both [small alpha] and [small delta]-carboline derivatives, starting from a common indolylchalcone oxime ester precursor is reported. The reaction involves mild conditions and uses a regiodivergent approach....