CN1134419C - Useful sypolyphenol intermediate and its preparation method - Google Patents
Useful sypolyphenol intermediate and its preparation method Download PDFInfo
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- CN1134419C CN1134419C CNB991111532A CN99111153A CN1134419C CN 1134419 C CN1134419 C CN 1134419C CN B991111532 A CNB991111532 A CN B991111532A CN 99111153 A CN99111153 A CN 99111153A CN 1134419 C CN1134419 C CN 1134419C
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Abstract
The present invention discloses a useful sypolyphenol intermediate and a preparation method thereof. The intermediate is prepared by the reaction of substituted benzoyl chloride with 1-methyl-4-nitro-3-n-propyl pyrazole-5-formamide, or by the reaction of substituted benzamide with 1-methyl-4-nitro-3-n-propyl pyrazole-5-carbonyl chloride. The intermediate is cyclized to be a pyrazolo primidinone derivative by reducing nitryl in the molecules of the intermediate.
Description
The present invention relates to intermediate of a kind of Alibra thing 'Xiduofeng ' and preparation method thereof.
'Xiduofeng ' is a kind of medicine for the treatment of impotence of Pfizer Inc.'s nineteen ninety invention, worldwide listing in 1998.
Chinese patent 91104162 discloses a kind of preparation method of 'Xiduofeng ', this method is carried out sulfonamide reaction by piperazine group and 5-phenyl-pyrazole hepyramine main body and is realized that two groups are connected, and wherein PyrazolopyrimidinonecGMP ring main body is the ring-closure reaction formation by precursor 4-(2-phenetole formamido group)-1-methyl-3-n-propyl pyrazoles-5-methane amide.
Chinese patent 94192386 discloses the application of the treatment impotence of 'Xiduofeng '.
Chinese patent 97113261 discloses the ring-closure reaction of PyrazolopyrimidinonecGMP part in the preparation 'Xiduofeng ' structure; this ring-closure reaction the piperazine group with carry out after the benzene sulfonyl group is connected, promptly by 4-[2-oxyethyl group-5-(4-methylpiperazine-1-base alkylsulfonyl) benzamido]-1-methyl-3-n-propyl pyrazoles-5-methane amide cyclization forms.
Researchist of the present invention has invented a kind of and above-mentioned patent disclosure, the different cyclization method of ring-closure reaction of PyrazolopyrimidinonecGMP part in the preparation 'Xiduofeng ' structure.The cyclization precursor that this method adopted is that 1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-replaces or/and the benzoyl imines that 5-replaces, by the nitro in its molecule is reduced, and a step cyclization is a PyrazolopyrimidinonecGMP simultaneously, this ring-closure reaction mild condition, shortened the reactions steps of preparation PyrazolopyrimidinonecGMP, the corresponding synthetic yield that has improved PyrazolopyrimidinonecGMP main part in the preparation 'Xiduofeng ' structure, the invention still further relates to structure as shown in the formula above-mentioned synthetic method in useful as intermediates.
Wherein R1 represents halogen, hydrogen, and alkoxyl group,
R2 represents hydrogen, alkylsulfonyl, SULPHURYL CHLORIDE, 4-methylpiperazine base alkylsulfonyl.
The present invention realizes by following synthetic route
Wherein R1 represents halogen, hydrogen, and alkoxyl group,
R2 represents hydrogen, alkylsulfonyl, SULPHURYL CHLORIDE, 4-methylpiperazine base alkylsulfonyl.
The invention will be further described for following examples
1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluorine
The preparation of 2-benzoyl imines (method one)
The ice bath cooling down, to be dissolved with the dichloromethane solution 100ml of 16.0g (0.1mol) 2-fluorobenzoyl chloride, be added drop-wise in methylene dichloride/DMF mixing solutions that 100ml contains 8.4g (0.04mol) 1-methyl-4-nitro-3-n-propyl pyrazoles-5-methane amide, 0.08g DMAP, 14.0ml (0.1ml) triethylamine.Reinforced finishing, stirring reaction is 12 hours under the room temperature, and it is complete that TLC detects feedstock conversion, and it is poured in the 500ml water, produces a large amount of solids, filter collection solid, washing.Filtrate is with dichloromethane extraction twice, merging filtrate, anhydrous magnesium sulfate drying filters, solvent evaporated under reduced pressure, faint yellow solid, heavy 8.6g, productive rate 65%, mp.89～90 ℃.Ultimate analysis (C
15H
15FN
4O
4) theoretical value (%): C53.89, H.4.49, N16.77, F5.69.Measured value (%): C54.2, H4.51, N16.77, F5.84.MS (m/z): 335.1 (molecular ion peaks).
1HMNR (CDCl
3): δ 1.02 (t, J=7.36Hz, 3H, n-propyl ,-CH
3), δ 1.71～1.81 (m, 2H, first CH in the n-propyl
2), δ 2.93 (t, J=7.48Hz, 2H, second CH in the n-propyl
2), δ 3.91 (s, 3H ,-NCH
3), δ 7.21～7.24 (m, 1H, phenyl ring H), δ 7.30～7.35 (m, 1H, phenyl ring H), δ 7.62～7.65 (m, 1H, benzoyl contraposition H), δ 7.98～8.02 (m, 1H, benzoyl ortho position H), δ 9.73～9.76 (brs, 1H ,-CONHCO-).IR：1730cm
-1(s，-CONHCO-)，1694cm
-1(s，-CONHCO-。
1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluorine
The preparation of benzoyl imines (method two)
The ice bath cooling down, the dichloromethane solution 100ml that will contain 23.2g (0.1mol) 1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl chloride is added drop-wise in the dichloromethane solution that 100ml is dissolved with 5.6g (0.04mol) 2-fluorobenzamide, 0.08g DMAP, 14.0ml (0.1ml) triethylamine.Reinforced finishing, stirring reaction is 12 hours under the room temperature, and it is complete that TLC detects feedstock conversion, and it is poured in the 500ml distilled water, produces a large amount of solids, filter collection solid, washing.Filtrate is with dichloromethane extraction twice, merging filtrate, anhydrous magnesium sulfate drying filters, solvent evaporated under reduced pressure, faint yellow solid, heavy 9.1g, productive rate 69%, mp.89～90 ℃.
1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluoro-5-(4-methyl
Piperazine-1-base alkylsulfonyl) preparation of benzoyl imines
Under the room temperature, 6.7g (0.02mol) 1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluorobenzoyl imines is joined in the 15.0ml chlorsulfonic acid in batches, reinforced finishing, system is warmed up to 60～70 ℃, reacted 2 hours, cool to room temperature adds the 5.4ml sulfur oxychloride then, at room temperature stirred 4 hours, stopped reaction slowly in the impouring 215g trash ice, is used 200ml and 100ml dichloromethane extraction with reaction mixture respectively, combining extraction liquid, with the washing of 100ml saturated sodium-chloride water solution, behind the anhydrous magnesium sulfate drying, filter, solvent evaporated under reduced pressure gets oily matter.Add the 25ml methylene dichloride and make it dissolving, to wherein dripping 0.76g (7.5 * 10
-3Mol) triethylamine and 1.2g (0.012mol) N methyl piperazine.Reinforced finishing continued stirring reaction 2 hours under the room temperature, and it is complete that TLC detects feedstock conversion, with the washing of 35ml saturated aqueous sodium carbonate, anhydrous magnesium sulfate drying, concentrate waxy solid, heavy 7.2g, productive rate 75%, MS (m/z): 477.1 (molecular ion peaks).
1HNMR (CDCl
3) δ 1.01 (t, J=7.36Hz, 3H, n-propyl-CH
3), δ 1.81～1.91 (m, 2H, second CH in the n-propyl
2), δ 2.30 (t, J=7.48Hz, 3H, piperazine-NCH
3), δ 2.51 (t, J=4.80Hz, 4H, n-formyl sarcolysine cardinal extremity CH on the piperazine ring
2), δ 2.93 (t, J=7.48Hz, second CH in the n-propyl
2), δ 3.15 (brs 4H, sulphonyl cardinal extremity CH on the piperazine ring
2), δ 4.27 (s, 3H, on the pyrazoles ring-NCH
3), δ 7.40 (dd, J
1=8.64Hz, J
2=11.56Hz, 1H phenyl ring H), δ 7.86～7.89 (m, 1H phenyl ring H), δ 8.65 (dd, J
1=2.42Hz, J
2=6.08Hz, phenyl ring H), 9.73～9.76 (brs, 1H ,-CONHCO-).IR:1730cm
-1(s ,-CONHCO-), 1690cm
-1(s ,-CONHCO-) 5-(2-fluorophenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo [4,3-d]-phonetic
The preparation of pyridine-7-ketone
6.6g (0.02mol) 1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluorobenzoyl imines is dissolved in the 10ml dehydrated alcohol, is warmed up to 65 ℃, add 27.0g (0.12mol) SnCl under stirring then in batches
2.2H
2O solid, feed rate control are that temperature does not surpass 70 ℃, keep under this temperature stirring reaction then 2～3 hours, and it is complete that TLC detects feedstock conversion.With the reaction mixture cool to room temperature, the frozen water cooling drips 2mol.L down
-1The NaOH aqueous solution is regulated pH7～8, and with 4 * 100ml dichloromethane extraction, anhydrous magnesium sulfate drying 12 hours filters, and removes solvent under reduced pressure, gets white powder, and heavy 4.6g productive rate is 81%.mp161-163℃。Ultimate analysis (C
15H
15FN
4O): theoretical value (%): C62.94, H5.24, N19.58, F6.64.Measured value (%): C62.82, H5.26, N19.52, F6.70.MS (m/z): 287.1 (molecular ion peaks).
1HMNR (CDCl
3): δ 1.03 (t, J=7.36Hz, 3H, n-propyl ,-CH
3), δ 1,81～1.91 (m, 2H, first CH in the n-propyl
2), δ 2.93 (t, J=7.48Hz, 2H, second CH in the n-propyl
2), δ 4.27 (s, 3H ,-NCH
3), δ 7.18～7.24 (m, 1H, phenyl ring H), δ 7.32～7.36 (m, 1H, phenyl ring H), δ 7.50～7.52 (m, 1H, benzoyl contraposition H), δ 8.28～8.33 (m, 1H, benzoyl ortho position H), δ 9.76～9.79 (s, 1H ,-CONH-).IR：1693cm
-1(s，-CONH-)。
5-[2-fluoro-5-(4-methylpiperazine-1-base alkylsulfonyl) phenyl]-1-methyl-3-n-propyl
-1, the preparation of 6-dihydro-7H-pyrazolo [4,3-d]-pyrimidin-7-ones
9.5g (0.02mol) 1-methyl-4-nitro-3-n-propyl pyrazoles-5-formyl-2-fluoro-5-(4-methylpiperazine-1-base alkylsulfonyl) benzoyl imines is dissolved in the 15ml dehydrated alcohol, is warmed up to 65 ℃, add 27.0g (0.12mol) SnCl under stirring then in batches
2.2H
2O solid, feed rate control are that temperature does not surpass 70 ℃, keep under this temperature stirring reaction then 2～3 hours, and it is complete that TLC detects feedstock conversion.With the reaction mixture cool to room temperature, the frozen water cooling drips 2mo1.L down
-1The NaOH aqueous solution is regulated pH7～8, and with 4 * 100ml dichloromethane extraction, anhydrous magnesium sulfate drying 12 hours filters, and removes solvent under reduced pressure, gets white powder, and heavy 7.6g productive rate is 85%.mp172～173℃。Ultimate analysis (C
20H
25FN
6O
35) theoretical value (%): C53.57, H5.58, N18.75, F4.24, S7.14.Measured value (%): C53.29, H5.61, N18.60, F4.39, S7.20.MS (m/z): 449.1 (molecular ion peaks).
1HMNR (CDCl
3): δ 1.02 (t, J=7.36Hz, 3H, n-propyl ,-CH
3), δ 1.81～1.91 (m, 2H, first CH in the n-propyl
2), δ 2.30 (t, J=7.48Hz, 3H, piperazine nitrogen methyl hydrogen), δ 2.53 (t, J=4.80Hz, 4H, n-formyl sarcolysine cardinal extremity CH on the piperazine ring
2), δ 2.93 (t, J=7.44Hz, 2H, second CH in the n-propyl
2), δ 3.15 (brs, 4H, sulphonyl cardinal extremity CH on the piperazine ring
2), 4.28 (s, 3H, nitrogen methyl hydrogen on the pyrazoles ring), δ 7.39 (dd, J
1=8.64Hz, J2=11.56Hz, 1H, phenyl ring H), δ 7.88～7.92 (m, 1H, phenyl ring H), δ 8.68 (dd, J
1=2.44Hz, J
2=6.14Hz phenyl ring H).IR：1702cm
-1(s，-CONH-)。
Claims (3)
- Structure as shown in the formula compoundWherein R1 represents halogen, hydrogen, and alkoxyl group,R2 represents hydrogen, alkylsulfonyl, SULPHURYL CHLORIDE, 4-methylpiperazine base alkylsulfonyl.
- 2. the method for preparing claim 1 compoundRepresent with following reaction formula:
Wherein R1 represents halogen, hydrogen, and alkoxyl group,R2 represents hydrogen, alkylsulfonyl, SULPHURYL CHLORIDE, 4-methylpiperazine base alkylsulfonyl. - 3, claim 1 compound is used to prepare following formula: compound
Wherein R1 represents halogen, hydrogen, and alkoxyl group,R2 represents hydrogen, alkylsulfonyl, SULPHURYL CHLORIDE, 4-methylpiperazine base alkylsulfonyl.
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Effective date of registration: 20040723 Address after: 100036 Beijing city Haidian District Cuiwei Road No. 4 Building No. 12, No. 4102 Yiyuanju Patentee after: Liu Yuan Address before: 100032 Ping On Mansion, No. 23, Xicheng District, Beijing, 718, Financial Street Patentee before: Sanxiong Hi-Tech Development Co Ltd, Beijing |
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