Synthesis and Application of a Novel Antitumor Active Compound
A compound and tumor drug technology, applied in anti-tumor drugs, organic chemistry, drug combination, etc., can solve the problems of high cytotoxicity, no effect in advanced cancer, stronger than curative effect, etc.
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[0011] The present invention provides a kind of pyridothiophene compound, its structure is as shown in the following formula I:
[0012] Formula Ⅰ
[0013] The reaction for preparing the compounds described in the present invention is as follows:
[0014]
[0015] To prepare intermediate I, add tert-butyl 4-oxopiperidine-1-carboxylate (30.0 mmol), 2-cyanoacetamide (30.0 mmol) and sulfur (30.0 mmol) in absolute ethanol (200 mL) Morpholine (30.0 mmol). The resultant was refluxed for 8 hours. The suspension was cooled to ambient temperature and filtered through a pad of celite and washed with absolute ethanol (30 mL x 3). The combined filtrates were concentrated to dryness. The crude product was diluted with 95% ethanol (30 mL) and filtered to obtain a white solid product as shown in Formula I with a yield of 83%.
[0016] To prepare Intermediate II, to a solution of Intermediate I (10 mmol) and DIEA (20 mmol) in dichloromethane (60 mL) was added dropwise the correspond...
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