Quinolizinones compound and preparation method and application thereof
The technology of a compound, quinazinone, applied in the field of medicine, can solve the problem of unknown anti-HBV activity
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[0065] Example 1 cis-10-methoxy-11-(3-methoxypropoxy)-3,3-dimethyl-7-oxo-3,3a,7,12b-tetrahydro-2H-furan And [3,2-c]pyrido[2,1-a]isoquinazine-6-carboxylic acid
[0066] The synthetic route is as follows:
[0067]
[0068] Step 1: Preparation of 6-(2-hydroxy-1,1-dimethyl-ethyl)-10-methoxy-9-(3-methoxypropoxy)-2-oxo-6,7 -Dihydrobenzo[a]quinazine-3-carboxylic acid ethyl ester
[0069] Add 6-(2-benzyloxy-1,1-dimethyl-ethyl)-10-methoxy-9-(3-methoxypropoxy)-2-oxo-6,7- Dihydrobenzo[a]quinazine-3-carboxylic acid ethyl ester (1.65g, 3mmol, preparation reference patent document US20160122344A1), and Pd / C (10%) (0.5g) was slowly added to ethanol (200mL), in hydrogen Pressurized under the atmosphere and mechanically stirred to obtain crude 6-(2-hydroxy-1,1-dimethyl-ethyl)-10-methoxy-9-(3-methoxypropoxy)-2 -Oxo-6,7-dihydrobenzo[a]quinazine-3-carboxylic acid ethyl ester (1.10g, yield about 79.7%), used directly in the next step without purification.
[0070] 1 H NMR(400MHz, CDCl 3 )δ: 8.43 (s, 1...
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