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Chemical Structure| 58045-88-8

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Product Details of [ 58045-88-8 ]

CAS No. :58045-88-8
Formula : C11H12O3
M.W : 192.21
SMILES Code : O=C/C=C/C1=CC=C(OC)C(OC)=C1

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Application In Synthesis of [ 58045-88-8 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 58045-88-8 ]

[ 58045-88-8 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 3054-95-3 ]
  • [ 5460-32-2 ]
  • [ 58045-88-8 ]
YieldReaction ConditionsOperation in experiment
80% With tetrabutylammonium acetate; palladium diacetate; potassium carbonate; In N,N-dimethyl-formamide; at 90℃; for 4h; To a stirred solution of <strong>[5460-32-2]1-iodo-3,4-dimethoxybenzene</strong> 8 (0.132g, 0.5mmol) in DMF (2.0mL) were added acrolein diethyl acetal (0.229mL, 1.5mmol), nBu4NOAc (0.302g, 1.0mmol), K2CO3 (0.104g, 0.75mmol), and Pd(OAc)2 (0.003g, 0.015mmol) and the mixture was stand for 4hat 90C. After that period, the mixture was cooled, hydrochloric acid 2N was slowly added and the reaction was stirred at room temperature for 10min. Then, the mixture was diluted with ethyl ether (50mL) and washed with water (3×50mL). The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography with dichloromethane as eluent to give the desired (E)-3-(3,4-dimethoxyphenyl)acrylaldehyde 9 in good yield (77mg, 80%). 4.9.1 (E)-3-(3,4-dimethoxyphenyl)acrylaldehyde (9) (0045) M.p. 80-82C. 1H NMR (300MHz, CDCl3): δ 3.93 (s, 3H, 3-OCH3), 3.94 (s, 3H, 4-OCH3), 6.62 (dd, 1H, H-α, J 15.8, 7.8Hz), 6.91 (d, 1H, H-5, J 8.3Hz), 7.08 (d, 1H, H-2, J 2.0Hz), 7.17 (dd, 1H, H-6, J 8.3, 2.0Hz), 7.42 (d, 1H, H-β, J 15.8Hz), 9.66 (d, 1H, CHO, J 7.8Hz) ppm. 13C NMR (75MHz, CDCl3): δ 55.8 and 55.9 (3,4-OCH3), 109.7 (C-2), 111.0 (C-5), 123.3 (C-6), 126.6 (C-α), 126.9 (C-1), 149.3 (C-3), 151.9 (C-4), 152.8 (C-β), 193.5 (CHO) ppm. MS m/z (ESI+, %): 193 ([M+H]+, 95), 215 ([M+Na]+, 100). HRMS (ESI+) m/z calcd. for C11H13O3 [M+H]+ 193.0859; found 193.0855.
53% With tetrabutylammonium acetate; palladium diacetate; potassium carbonate; In N,N-dimethyl-formamide; at 90℃; for 4h; To a solution of the appropriate 4-iodobenzene 7a,b (1.0 mmol)in DMF (10 mL) were added the following reagents through thereferred order: acrolein diethyl acetal (0.46 mL, 3.0 mmol), nBu4-NOAc (0.603 g, 2.0 mmol), K2CO3 (0.207 g, 1.5 mmol), and Pd(OAc)2 (6.7 mg, 0.03 mmol) (for 8a) or PdCl2 (5.3 mg, 0.03 mmol) (for 8b). This mixturewas stirred at 90 C for 4 h for 8a and 21 h for 8b. After this period, it was poured onto ice (50 g) and H2O (100 mL) and thepH was adjusted to 1 with diluted HCl. In the case of 8a, this aqueous solution was extracted with Et2O (3 50 mL) and theorganic layer was dried over anhydrous Na2SO4. In the case of 8b, the obtained precipitate was filtered off, taken in CH2Cl2 and driedover anhydrous Na2SO4. The solvent was evaporated to the dryness and both residues were purified by silica gel column chromatographyusing CH2Cl2 as eluent.4.1.7.1. (E)-3,4-Dimethoxycinnamaldehyde (8a). White solid(102 mg, 53% yield); Rf 0.28. Mp 80-82 C. 1H NMR (300.13 MHz,CDCl3): δ 9.66 (d, J 7.8 Hz, 1H, CHO), 7.42 (d, J 15.8 Hz, 1H, H-b), 7.17(dd, J 8.3 and 2.0 Hz, 1H, H-6), 7.08 (d, J 2.0 Hz, 1H, H-2), 6.91 (d, J8.3 Hz, 1H, H-5), 6.62 (dd, J 15.8 and 7.8 Hz, 1H, H-a), 3.94 (s, 3H, 4-OCH3), 3.93 (s, 3H, 3-OCH3) ppm. 13C NMR (75.47 MHz, CDCl3):δ 193.5 (CHO), 152.8 (C-b), 151.9 (C-4), 149.3 (C-3), 126.9 (C-1), 126.6(C-a), 123.3 (C-6), 111.0 (C-5), 109.7 (C-2), 55.9 and 55.8 (3,4-OCH3)ppm. ESI-MS m/z (%): 215 ([M+Na]+, 100), 193 ([M+H]+, 95). ESIHRMSm/z calcd for [C11H12O3H]: 193.0865, found: 193.0855.
  • 2
  • [ 3929-47-3 ]
  • [ 58045-88-8 ]
  • 3
  • [ 58045-88-8 ]
  • [ 70298-89-4 ]
  • N-{3-[(2E)-3-(3,4-dimethoxyphenyl)-1-hydroxyprop-2-en-1-yl]pyridin-4-yl}-2,2-dimethylpropanamide [ No CAS ]
 

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