1-a]isoquinolines by a domino reaction from a variety of 3,4-dihydropyrrolo[2,1-a]isoquinolines and α,β-unsaturated aldehydes in the absence of catalyst in good yields under microwave irradiation, is reported. An efficient synthesis of pyrrolo[2,1-a]isoquinolines by a domino reaction from a variety of 3,4-dihydropyrrolo[2,1-a]isoquinolines and α,β-unsaturated aldehydes in the absence of catalyst in
Photoredox Generated Vinyl Radicals: Synthesis of Bisindoles and β-Carbolines
作者:Neha Chalotra、Ajaz Ahmed、Masood Ahmad Rizvi、Zakir Hussain、Qazi Naveed Ahmed、Bhahwal Ali Shah
DOI:10.1021/acs.joc.8b02193
日期:2018.12.7
A photoredox catalyzed approach enabling use of alkynes as surrogate of 2-oxoaldehydes/1,2-diones is reported. The method overcomes the difficulty associated with application of unsubstituted aliphatic α-oxoaldehydes, which has hitherto limited their general use. Indoles, tryptamine, and tryptophan methyl ester participated in the reaction to give a variety of α-oxo based analogues. Quantum yield investigations
Multi‐birds with one stone: A cascade couplingstrategy was developed for the synthesis of β‐carbolines. The method can direct the synthesis of β‐carboline and isoquinoline‐containing natural products with high yields. Moreover, this protocol can also be further applied towards the totalsynthesis of natural products fascaplysin and papaverin (see scheme).
Total Syntheses of Eudistomins Y<sub>1</sub>-Y<sub>7</sub>by an Efficient One-Pot Process of Tandem Benzylic Oxidation and Aromatization of 1-Benzyl-3,4-dihydro-β-Carbolines
作者:Tien Ha Trieu、Jing Dong、Qiang Zhang、Bo Zheng、Tian-Zhuo Meng、Xia Lu、Xiao-Xin Shi
DOI:10.1002/ejoc.201300080
日期:2013.6
The first total synthesis of eudistomin Y7 (7) and totalsyntheses of eudistomins Y1–Y6 (1–6) are described. An efficient room-temperature conversion of 1-benzyl-3,4-dihydro-β-carbolines (11) into 1-benzoyl-β-carbolines (14) by a one-potprocess of tandembenzylicoxidation and aromatization as the key step of these totalsyntheses was also studied in detail.
An expeditious one-step synthesis of the imidazopyridoindole scaffold was achieved through the C–H oxidation/two-fold cyclization reaction of methyl ketone and tryptamine derivatives. Mild oxidizing conditions were employed to realize the efficientoxidation of C(sp3)–H bonds, while suppressing overoxidation of the intermediate and ensuring the cross-trapping of two in situ generated acylimine intermediates