[EN] CHROMANE-SUBSTITUED TETRACYCLIC COMPOUNDS AND USES THEREOF FOR TREATMENT OF VIRAL DISEASES [FR] COMPOSÉS TÉTRACYCLIQUES SUBSTITUÉS PAR CHROMANE ET LEURS UTILISATIONS DANS LE TRAITEMENT DE MALADIES VIRALES
Compounds, methods of making such compounds, pharmaceutical compositions and medicaments comprising such compounds, and methods of using such compounds to treat, prevent or diagnose diseases, disorders, or conditions associated with one or more of the lysophosphatidic acid receptors are provided.
Synthesis of 3-halochromones with simple KX halogen sources enabled by <i>in situ</i> halide oxidation
作者:Yan Lin、Jie-Ping Wan、Yunyun Liu
DOI:10.1039/d0nj00825g
日期:——
On the basis of a designated in situ oxidation tactic, the synthesis of 3-halochromones has been realized for the first time by using simple KX (X = Br, I) salts as halogen sources. Instead of the free radical process, the control experiments indicate that the reported reactions proceed through a halogenium intermediate. Compared to the known synthetic methods relying on molecular halogen, haloid acid
Selectfluor-Mediated Tandem Cyclization of Enaminones for the Synthesis of 3-Fluorochromones
作者:Venu Kandula、Pradeep Kumar Thota、Poosa Mallesham、K. Raghavulu、Anindita Chatterjee、Satyanarayana Yennam、Manoranjan Behera
DOI:10.1055/s-0039-1691489
日期:2019.12
An efficient synthesis of various 3-fluorochromones (3-fluoro-4H-chromene-4-ones) fromenaminoketones by using Selectfluor is described. The key step in the synthesis involves tandem fluorination and cyclization to form 3-fluorochromones in good yields. The significant features of this method include simple operational procedures, a high purity of the product, and excellent regioselectivity.
Application of E1cB Elimination in Asymmetric Organocatalytic Cascade Reactions To Construct Polyheterocyclic Compounds
作者:Zhi-Hao You、Ying-Han Chen、Yu Tang、Yan-Kai Liu
DOI:10.1021/acs.orglett.9b03138
日期:2019.10.18
By introducing a carbon functionality at 2-position of chromane, the formal asymmetric functionalization of the 3-position of 2-substituted chromane has been realized via a highly chemo-, regio-, and stereoselective organocatalyticcascadereaction in a sequential one-pot manner involving an E1cB mechanism governed ring-opening process. Critical to our success was the design of a chiral dipeptide-based
A facile and efficient approach to 3-thiocyanato-4H-chromen-4-ones from enaminones and KSCN was realized at room temperature. In addition, one-pot synthesis of 3-thiocyanatochromenones from 2-hydroxylacetophenones was also developed.