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Methyl Isobutyl Ketone → 7-[2-[4-(diphenylmethylene)-1-piperidinyl]ethyl]-3,4-dihydro-8-methyl-2H,6H-pyrimido[2,1-b][1,3]-thiazin-6-one

HRID 484735
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HRID 484735 반응식
Br.Br[CH2:3][CH2:4][C:5]1[C:14](=[O:15])[N:13]2[C:8]([S:9][CH2:10][CH2:11][CH2:12]2)=[N:7][C:6]=1[CH3:16].Br.[C:18]1([C:24]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)=[C:25]2[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]2)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C(=O)([O-])[O-].[Na+].[Na+].CC(C)CC(=O)C>O>[C:18]1([C:24]([C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)=[C:25]2[CH2:26][CH2:27][N:28]([CH2:3][CH2:4][C:5]3[C:14](=[O:15])[N:13]4[C:8]([S:9][CH2:10][CH2:11][CH2:12]4)=[N:7][C:6]=3[CH3:16])[CH2:29][CH2:30]2)[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=1
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

6

반응물 4

HCID 7909Methyl Isobutyl KetoneHCID 10340Sodium CarbonateHCID 155864667-(2-bromoethyl)-3,4-dihydro-8-methyl-2H,6H-pyrimido[2,1-b][1,3]thiazin-6-one monohydrobromideHCID 233260664-(Diphenylmethylene)piperidine hydrobromide

생성물 1

HCID 133632517-[2-[4-(diphenylmethylene)-1-piperidinyl]ethyl]-3,4-dihydro-8-methyl-2H,6H-pyrimido[2,1-b][1,3]-thiazin-6-one
수율 60%

시약·촉매·용매 1

HCID 962Water용매

실험 절차

A mixture of 7.4 parts of 7-(2-bromoethyl)-3,4-dihydro-8-methyl-2H,6H-pyrimido[2,1-b][1,3]thiazin-6-one monohydrobromide, 6.6 parts of 4-(diphenylmethylene)piperidine hydrobromide, 12 parts of sodium carbonate and 120 parts of 4-methyl-2-pentanone was stirred and refluxed overnight. The reaction mixture was cooled, water was added and the layers were separated. The organic phase was dried, filtered and evaporated. The residue was purified by column-chromatography over silica gel using a mixture of trichloromethane and methanol (95:5 by volume) as eluent. The pure fractions were collected and the eluent was evaporated. The residue was crystallized from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane. The product was filtered off and recrystallized from 2-propanol, yielding 5.5 parts (60%) of 7-[2-[4-(diphenylmethylene)-1-piperidinyl]ethyl]-3,4-dihydro-8-methyl-2H,6H-pyrimido[2,1-b][1,3]-thiazin-6-one; mp. 176.0° C. (compound 104).

후처리

  1. temperaturerefluxed overnight
  2. temperatureThe reaction mixture was cooled
  3. customthe layers were separated
  4. customThe organic phase was dried
  5. filtrationfiltered
  6. customevaporated
  7. customThe residue was purified by column-chromatography over silica gel using
  8. additiona mixture of trichloromethane and methanol (95:5 by volume) as eluent
  9. customThe pure fractions were collected
  10. customthe eluent was evaporated
  11. customThe residue was crystallized from a mixture of 4-methyl-2-pentanone and 2,2'-oxybispropane
  12. filtrationThe product was filtered off
  13. customrecrystallized from 2-propanol

출처 및 근거

ORD 기록
ord-c0ce5e7531574d9fb47fbfc8dd7d42f5
출처 데이터셋
uspto-grants-1985_08
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US04533665

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