Sodium Carbonate → Ethyl 6-((S)-1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylate

HRID 1630317ノート

反応式

HRID 1630317 の反応式
[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:27])=[N:14][C:15]2[N:16]([N:19]=[C:20]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[CH:21]=2)[C:17]=1I)[C:7]([O:9][CH2:10][CH3:11])=[O:8])([CH3:4])([CH3:3])[CH3:2].[Cl:28][C:29]1[C:38]2[NH:37][CH2:36][CH2:35][O:34][C:33]=2[CH:32]=[CH:31][C:30]=1B1OC(C)(C)C(C)(C)O1.C([O-])([O-])=O.[Na+].[Na+]>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:1]([O:5][C@@H:6]([C:12]1[C:13]([CH3:27])=[N:14][C:15]2[N:16]([N:19]=[C:20]([C:22]([O:24][CH2:25][CH3:26])=[O:23])[CH:21]=2)[C:17]=1[C:30]1[CH:31]=[CH:32][C:33]2[O:34][CH2:35][CH2:36][NH:37][C:38]=2[C:29]=1[Cl:28])[C:7]([O:9][CH2:10][CH3:11])=[O:8])([CH3:4])([CH3:3])[CH3:2]

参加物

6

反応物 3

HCID 10340Sodium CarbonateHCID 595786245-chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazineHCID 86691589HCID 86691589、化合物

生成物 1

HCID 71258189Ethyl 6-((S)-1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylate

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒HCID 6228Dimethylformamide溶媒

反応条件

温度
90 °C

実験手順

A mixture of (S)-ethyl 6-(1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-iodo-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylate (400 mg, 0.817 mmol), 5-chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine (prepared according to the procedure described in WO 2009/062285; 290 mg, 0.981 mmol) and 2N Na2CO3 (0.817 mL, 1.635 mmol) in DMF (8 mL) was degassed for 15 min. Tetrakis(triphenylphosphine)palladium(0) (66.1 mg, 0.057 mmol) was added and the degassing was continued for another 5 min. The mixture was then heated at 90° C. for 16 h. At this point LCMS indicated completion of reaction and presence of desired product. After cooling to room temperature, water was added (25 mL) and the mixture was extracted with ethyl acetate (2×100 mL), washed with brine (100 mL), dried (Na2SO4), filtered and concentrated. The crude was purified by biotage (5-70% EtOAc/hexane) to afford ethyl 6-((S)-1-(tert-butoxy)-2-ethoxy-2-oxoethyl)-7-(5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxylate (315 mg, 0.593 mmol, 72.6% yield) as a mixture of two atrope isomers which are not separable (approx 10-15% of minor atrope isomer present by LCMS and NMR). Mixture was used as is in the next step without further purification.

後処理

  1. customprepared

出典と根拠

ORDレコード
ord-023333367f964c098cd56fc6ea271a19
出典データセット
uspto-grants-2014_07
特許番号
US08791108B2

反応ノート

読み込み中…