An efficientcopper(I) iodide‐catalyzed sulfenylation of maleimides and related 3‐indolylmaleimides with thiols has been developed in the presence of fluoroboric acid. Several 3‐thiomaleimides and 3‐indolyl‐4‐thiomaleimides were obtained with good yields under ligand‐free conditions. The methods are simple, practical and show good functional group tolerance.
trichloride under mild reaction conditions. The method is simple, efficient, and practical. A highlyefficient synthetic strategy for Michaeladdition of indoles and pyrroles to maleimides has been developed using the Lewis acids zinc chloride or aluminum trichloride as the catalyst. The reactions generated 3-substituted indoles and 2-substituted pyrroles in high yields with excellent regioselectivity in the
Palladium-Catalyzed Tandem Regioselective Oxidative Coupling from Indoles and Maleimides: One-Pot Synthesis of Indolopyrrolocarbazoles and Related Indolylmaleimides
8-diones has been developed from both free and protected (NH) indoles and maleimides via a regioselective tandem oxidative coupling reaction. The yields are moderate to excellent. In addition, 2-substitutedindoles are suitable substrates in this protocol, leading to the formation of indolylmaleimides. The present methodology provides a concise route to highly functionalized indolopyrrolocarbazole derivatives
从游离和受保护的(吲哚)吲哚和二氢吲哚都开发了一种有效的Pd(II)催化方法,用于直接合成吲哚并[3,2- a ]吡咯并[3,4- c ]咔唑-6,8-二酮。通过区域选择性串联氧化偶联反应进行马来酰亚胺。产量中等至极好。另外,在该方案中2-取代的吲哚是合适的底物,导致吲哚基马来酰亚胺的形成。本方法学提供了高度官能化的吲哚并吡咯并咔唑衍生物的简洁途径。
Photochemical [2+4]‐Dimerization Reaction from the Excited State
作者:Sapna Ahuja、Sruthy Baburaj、Lakshmy Kannadi Valloli、Sarvar Aminovich Rakhimov、Kavyasree Manal、Aakrati Kushwaha、Steffen Jockusch、Malcolm D. E. Forbes、Jayaraman Sivaguru
DOI:10.1002/anie.202316662
日期:2024.1.22
Novel divergent excited state reactivity of aryl-maleimides undergoing an unexpected [2+4]-photodimerization is presented with detailed mechanistic rationale. The stereochemistry of the photodimer formed is complementary to the product observed under thermal conditions and is dictated by the type of non-bonding interactions prevalent in the photoexcited reactant.