Dimethylacetamide → tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{4-cyclopropyl-5-[3-(2-ethylbutyl)cyclobutyl]isoxazol-3-yl}valerate

HRID 1912097ノート

反応式

HRID 1912097 の反応式
[Si:1]([O:18][CH2:19][CH2:20][CH:21]([C:30]1[C:34](I)=[C:33]([CH:36]2[CH2:39][CH:38]([CH2:40][CH:41]([CH2:44][CH3:45])[CH2:42][CH3:43])[CH2:37]2)[O:32][N:31]=1)[CH2:22][C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:46]1(B2OC(C)(C)C(C)(C)O2)[CH2:48][CH2:47]1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].CN(C)C(=O)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.C(OCC)(=O)C>[Si:1]([O:18][CH2:19][CH2:20][CH:21]([C:30]1[C:34]([CH:46]2[CH2:48][CH2:47]2)=[C:33]([CH:36]2[CH2:39][CH:38]([CH2:40][CH:41]([CH2:44][CH3:45])[CH2:42][CH3:43])[CH2:37]2)[O:32][N:31]=1)[CH2:22][C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

7

反応物 4

HCID 31374DimethylacetamideHCID 62657Potassium Phosphate, TribasicHCID 27580152-Cyclopropyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 71127336tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{5-[3-(2-ethylbutyl)cyclobutyl]-4-iodoisoxazol-3-yl}valerate

生成物 1

HCID 71114789tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{4-cyclopropyl-5-[3-(2-ethylbutyl)cyclobutyl]isoxazol-3-yl}valerate収率 65.2%

試薬・触媒・溶媒 2

HCID 178418476HCID 178418476、化合物触媒HCID 8857Ethyl Acetate溶媒

反応条件

温度
80 °C

実験手順

tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-{5-[3-(2-ethylbutyl)cyclobutyl]-4-iodoisoxazol-3-yl}valerate (4.96 g), 2-cyclopropyl-4,4,5,5-tetramethyl-[1,3,2]dioxaborolane (1.68 g), tripotassium phosphate (5.66 g), PdCl2(PPh3)2 (468 mg) and N,N-dimethylacetamide (50 mL) were mixed. The mixture was stirred at 80° C. for 5 hr. To the reaction mixture were added ethyl acetate (50 mL) and Celite at RT, and the mixture was filtered. The collected solid was washed with ethyl acetate (50 mL×2). The filtrate was washed with water/brine=1/1 (100 mL×2) and brine (50 mL), then dried over sodium sulfate. The sodium sulfate was filtered off and the filtrate was concentrated in vacuo. The resultant residue was purified by silica gel column chromatography (Eluent: ethyl acetate/hexane=1/50→1/40→1/30→1/20) to give the title compound (2.86 g).

後処理

  1. filtrationthe mixture was filtered
  2. washThe collected solid was washed with ethyl acetate (50 mL×2)
  3. washThe filtrate was washed with water/brine=1/1 (100 mL×2) and brine (50 mL)
  4. dry with materialdried over sodium sulfate
  5. filtrationThe sodium sulfate was filtered off
  6. concentrationthe filtrate was concentrated in vacuo
  7. customThe resultant residue was purified by silica gel column chromatography (Eluent: ethyl acetate/hexane=1/50→1/40→1/30→1/20)

出典と根拠

ORDレコード
ord-d091e1c03ff343e4a1fee1fbf3293487
出典データセット
uspto-grants-2013_12
特許番号
US08604069B2

反応ノート

読み込み中…