68123-32-0Relevant articles and documents
Method for synthesizing benzophenanthridine and protoberberine alkaloids through modular diversity regulation and control
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, (2021/05/29)
The invention discloses a method for synthesizing benzophenanthridine and protoberberine alkaloids through modular diversity regulation and control. The method comprises the following steps: improving a substituent group of a high-iodine salt leaving group, generating pyridine alkyne under the action of relatively mild potassium tert-butoxide, and carrying out [4 + 2] cycloaddition reaction on the pyridine alkyne and diene to obtain polysubstituted isoquinoline ring precursor compounds. Ring opening and aromatization of the isoquinoline ring precursor are realized by developing a novel iridium-catalyzed cross-coupling method, polysubstituted isoquinoline ring compounds with connecting capacity are efficiently synthesized, and then the polysubstituted isoquinoline ring compounds are coupled with a high-activity polysubstituted cyclic boric acid to obtain 3-aryl isoquinoline high-grade intermediates. Through application of two different chemical principles, regulation and control of the 3-aryl isoquinoline high-grade intermediates are realized, and benzophenanthridine and protoberberine alkaloids are modularly, diversely and efficiently synthesized.
Anti-atherosclerotic 6,7-dihydro-7,7-disubstituted-khellin analogs
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, (2008/06/13)
The present specification provides novel analogs of khellin. These analogs are all useful as antiatherosclerotic agents. Particularly, the present specification provides 4-methoxy, 9-methoxy, or 4,9-dimethoxy-6,7-dihydro-7,7-disubstituted-5H-furo[3,2-g][1]benzopyran-5-ones.
