Binap, (A+-)- → 4-chloro-6-(2,3,5,6-tetrahydro-[1,2']bipyrazinyl-4-yl)-2H-phthalazin-1-one

HRID 1667492

反応式

HRID 1667492 の反応式
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](=[O:12])[NH:7][N:6]=[C:5]2[Cl:13].[N:14]1[CH:19]=[CH:18][N:17]=[CH:16][C:15]=1[N:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1.C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.CC([O-])(C)C.[Na+]>CC(N(C)C)=O.CCOC(C)=O.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Cl:13][C:5]1[C:4]2[C:9](=[CH:10][CH:11]=[C:2]([N:23]3[CH2:24][CH2:25][N:20]([C:15]4[CH:16]=[N:17][CH:18]=[CH:19][N:14]=4)[CH2:21][CH2:22]3)[CH:3]=2)[C:8](=[O:12])[NH:7][N:6]=1

参加物

8

反応物 4

HCID 634876Binap, (A+-)-HCID 27346391-PiperazinylpyrazineHCID 23676156Sodium t-butoxideHCID 533084876-Bromo-4-chlorophthalazin-1(2H)-one

生成物 1

HCID 249470354-chloro-6-(2,3,5,6-tetrahydro-[1,2']bipyrazinyl-4-yl)-2H-phthalazin-1-one収率 16.7%

試薬・触媒・溶媒 3

HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 8857Ethyl Acetate溶媒HCID 31374Dimethylacetamide溶媒

実験手順

A mixture 6-bromo-4-chloro-2H-phthalazin-1-one (145 mg, 0.559 mmol), 1-(2-pyrazinyl)piperazine (104 mg, 0.633 mmol), Pd2(dba)3 (43 mg, 0.047 mmol), rac-BINAP (116 mg, 0.186 mmol) and NaOtBu (167 mg, 1.738 mmol) in DMA (5 mL) was heated at 85° C. for 1.5 h. The mixture was allowed to cool, diluted with EtOAc and washed with water. The organic layer was washed with sat.aq. NaHCO3, brine and dried (Na2SO4). Preparatory HPLC afforded 4-chloro-6-(2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-yl)-2H-phthalazin-1-one (32 mg) as a yellow solid, 1H (400 MHz, d6-DMSO) δ: 3.62 (m, 4H), 3.78 (m, 4H), 7.12 (d, 1H), 7.60 (dd, 1H), 7.87 (d, 1H), 8.07 (d, 1H), 8.11 (m, 1H), 8.37 (s, 1H), 12.51 (s, 1H) ppm. m/z (M+1) 342.98.

後処理

  1. temperatureto cool
  2. washwashed with water
  3. washThe organic layer was washed with sat.aq
  4. dry with materialNaHCO3, brine and dried (Na2SO4)

出典と根拠

ORDレコード
ord-f67a6f891ef740a7aae88db4dddbf12e
出典データセット
uspto-grants-2011_10
特許番号
US08044041B2

関連ノート

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