Synthesis of 2-Amino-2′-hydroxy-1,1′-biaryls via Cascade Benzannulation and C–N Bond Cleavage Sequence
作者:Raju Adepu、Jadhav Rahul Dhanaji、Polasani Samatha、Prathama S. Mainkar、Srivari Chandrasekhar
DOI:10.1021/acs.orglett.0c02749
日期:2020.11.6
with indolyl β-ketonitrile/ester in a cascade manner is demonstrated. The reaction sequence involves benzyne-mediated [2 + 2] Stoltz-type cycloaddition–cleavage and intramolecular Michael addition followed by C–N bondcleavage under transition-metal-free reaction conditions. Interestingly, while [4 + 2] Diels–Alder reaction is a possible pathway, no traces of the regioisomer was isolated.
We successfully developed an unprecedented route to carbazole synthesis through visible light-photocatalysed formal (4+2) cycloaddition of indole-derived bromides and alkynes. This novel protocol features extremely mild conditions, a broad substrate...
Feasible selective synthesis of 3-Acetylindoles and 3-Acetoacetylindoles from β-ethylthio-β-indoly α, β-unsaturated ketones
作者:Wen-Ju Wang、Hai-Feng Yu
DOI:10.1080/00397911.2018.1555851
日期:2019.2.1
Abstract An efficient and selective synthesis of 3-acetyl free(N-H)/N-substituded indoles and 3-acetoacetyl free(N-H)/N-substituded indoles has been developed via the hydrolysis reaction of β-ethylthio-β-indoly α, β-unsaturatedketones in the presence of 3 equivalent of NaOH and 5 mol% of H2SO4, respectively. The procedure features easy operation, excellent yields, and high selectivity, compatibility