中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
7-氨基-4-甲基香豆素 | 7-amino-4-methylcoumarin. | 26093-31-2 | C10H9NO2 | 175.187 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 7-acetamido-4-methylcoumarin | 66611-72-1 | C12H11NO3 | 217.224 |
7-氨基-4-甲基香豆素 | 7-amino-4-methylcoumarin. | 26093-31-2 | C10H9NO2 | 175.187 |
—— | 4-methylpyrano[2,3-e]indole-2,8,9(7H)-trione | 1402146-24-0 | C12H7NO4 | 229.192 |
A synthesis of 4-methylpyrano[2,3-e]indole-2,8,9-trione (5) is achieved from 7-amino-4- methylcoumarin by adopting the classical Sandmeyer methodology. The cyclocondensation reaction of pyrano-isatin 5 with the appropriately substituted o-phenylenediamines 6 in polyphosphoric acid proceeded regioselectively to furnish the respective pyrano[2’,3’:4,5]indolo[2,3-b]quinoxalines 7a - c. Structural assignments of the new compounds are based on microanalytical and spectral (IR, MS and NMR) data.
Respiratory syncytial virus (RSV) is a critical cause of infant mortality. However, there are no vaccines and adequate drugs for its treatment. We showed, for the first time, that O-linked coumarin–monoterpene conjugates are effective RSV inhibitors. The most potent compounds are active against both RSV serotypes, A and B. According to the results of the time-of-addition experiment, the conjugates act at the early stages of virus cycle. Based on molecular modelling data, RSV F protein may be considered as a possible target.