Three distinct reactions of 3,4-dihydroisoquinolines with azlactones: novel synthesis of imidazoloisoquinolin-3-ones, benzo[a]quinolizin-4-ones, and benzo[d]azocin-4-ones |
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Authors: | Worayuthakarn Rattana Thasana Nopporn Ruchirawat Somsak |
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Institution: | Chulabhorn Research Institute, Vipavadee Rangsit Highway, Bangkok 10210, Thailand. |
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Abstract: | A facile and direct synthetic entry to tricyclic imidazoloisoquinolin-3-ones and benzoa]quinolizin-4-ones is reported based on the ring annulation of 1-unsubstituted and 1-substituted dihydroisoquinolines with azlactones under neutral conditions in a one-step procedure. Bicyclic 2,3-dihydrobenzod]azocin-4-ones were also prepared using simple azlactone and 1-substituted dihydroisoquinolines in a one-pot reaction. reaction: see text] |
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