1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → N-(8-benzyl-7-((2R,3R,4S,5R)-3,4-dihydroxy-5-methoxy-6,6-dimethyltetrahydro-2H-pyran-2-yloxy)-2-oxo-2H-chromen-3-yl)-3',6-dimethoxybiphenyl-3-carboxamide

HRID 1511241Notes

Reaction equation

HRID 1511241 reaction equation
[CH2:1]([C:8]1[C:9]([O:30][C@H:31]2[C@@H:36]3[O:37]C(=O)[O:39][C@@H:35]3[C@@H:34]([O:41][CH3:42])[C:33]([CH3:44])([CH3:43])[O:32]2)=[CH:10][CH:11]=[C:12]2[C:17]=1[O:16][C:15](=[O:18])[C:14]([NH:19]C(=O)OCC1C=CC=CC=1)=[CH:13]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CCN=C=NCCCN(C)C.[CH3:56][O:57][C:58]1[CH:59]=[C:60]([C:64]2[C:69]([O:70][CH3:71])=[CH:68][CH:67]=[C:66]([C:72]([OH:74])=O)[CH:65]=2)[CH:61]=[CH:62][CH:63]=1.C(=O)([O-])[O-]>[Pd].C1COCC1.N1C=CC=CC=1.C(Cl)Cl.CO.C(Cl)Cl.C(N(CC)CC)C>[CH2:1]([C:8]1[C:9]([O:30][C@H:31]2[C@H:36]([OH:37])[C@H:35]([OH:39])[C@@H:34]([O:41][CH3:42])[C:33]([CH3:44])([CH3:43])[O:32]2)=[CH:10][CH:11]=[C:12]2[C:17]=1[O:16][C:15](=[O:18])[C:14]([NH:19][C:72]([C:66]1[CH:65]=[C:64]([C:60]3[CH:61]=[CH:62][CH:63]=[C:58]([O:57][CH3:56])[CH:59]=3)[C:69]([O:70][CH3:71])=[CH:68][CH:67]=1)=[O:74])=[CH:13]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

11

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 19660Carbonate IonHCID 25140542Benzyl 8-benzyl-7-((3aR,4R,7R,7aR)-7-methoxy-6,6-dimethyl-2-oxotetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yloxy)-2-oxo-2H-chromen-3-ylcarbamateHCID 549124263',6-Dimethoxy-(1,1'-biphenyl)-3-carboxylic acid

Product 1

HCID 25139814N-(8-benzyl-7-((2R,3R,4S,5R)-3,4-dihydroxy-5-methoxy-6,6-dimethyltetrahydro-2H-pyran-2-yloxy)-2-oxo-2H-chromen-3-yl)-3',6-dimethoxybiphenyl-3-carboxamideYield 3.4%

Reagents, catalysts & solvents 6

HCID 23938PalladiumCatalystHCID 887MethanolSolventHCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolventHCID 8471TriethylamineSolventHCID 21875418Pyridine methylene chlorideSolvent

Procedure

Palladium on carbon (10%, 46 mg) was added to 25e (230 mg, 0.38 mmol) in anhydrous THF (2.50 mL) and the solution was placed under an atmosphere of H2. After 12 hours, the solution was filtered through SiO2 (1:1 CH2Cl2:Acetone) and the eluent was concentrated to afford a yellow solid, which was used without further purification (177 mg, 99%). EDCI (61.5 mg, 0.32 mmol) and 3′,6-dimethoxybiphenyl-3-carboxylic acid (66.3 mg, 0.26 mmol) were added to the amine (60.0 mg, 0.13 mmol) in 30% pyridine/CH2Cl2 (3.50 mL). After 12 hours, the solvent was concentrated and the residue purified via column chromatography (SiO2, 3:1 Hexane:Ether→20:1 CH2Cl2:Acetone) to afford a colorless solid, which was used without further purification (12.3 mg, 14%). Triethylamine (150 μL) was added to the carbonate (12.3 mg, 0.017 mmol) in MeOH (1.5 mL) and CH2Cl2 (1.5 mL). After 48 hours, the solvent was concentrated and the residue purified via column chromatography (SiO2, 40:1 CH2Cl2:Acetone) to afford 26e as a colorless amorphous solid (6.00 mg, 51%, 7.1% over 3 steps): 1H NMR (CD2Cl2, 400 MHz) 8.84 (s, 1H), 8.72 (s, 1H), 7.96 (dd, J=10, 2.4 Hz, 1H), 7.91 (d, J=2.4 Hz, 1H), 7.50 (d, J=8.8 Hz, 1H), 7.39 (t, J=7.9 Hz, 1H), 7.31 (d, J=8.8 Hz, 1H), 7.28-7.25 (m, 5H), 7.21-7.18 (m, 1H), 7.15-7.11 (m, 2H), 6.97-6.94 (m, 1H), 5.54 (d, J=2.7 Hz, 1H), 4.25 (t, J=15.1 Hz, 2H), 4.17-4.11 (m, 1H), 4.05 (d, J=2.6 Hz, 1H), 3.93 (s, 3H), 3.88 (s, 3H), 3.58 (s, 3H), 3.31 (d, J=8.7 Hz, 1H), 2.64 (s, 1H), 2.04 (s, 1H), 1.40 (s, 3H), 1.03 (s, 3H); 13C NMR (CDCl3, 125 MHz) 165.5, 159.8, 159.3, 159.3, 156.4, 148.9, 140.0 (2C), 138.6, 131.1, 130.0, 129.2, 128.5, 128.3, 128.2, 127.0, 126.2 (2C), 126.0 (2C), 124.1, 122.2, 122.0, 117.2, 115.2, 114.4, 113.2, 111.7, 111.0, 98.0, 70.6 (2C), 68.6, 61.6, 55.9, 55.4, 29.3, 28.9, 28.3; IR (film) νmax 3404, 2930, 2359, 2341, 1713, 1670, 1605, 1526, 1502, 1367, 1244, 1180, 1134, 1076, 1026, 960 cm−1; HRMS (ESI+) m/z: [M+H]+ calcd for C39H39NO10, 682.2652. found, 682.2653.

Workup

  1. filtrationthe solution was filtered through SiO2 (1:1 CH2Cl2:Acetone)
  2. concentrationthe eluent was concentrated
  3. customto afford a yellow solid, which
  4. customwas used without further purification (177 mg, 99%)
  5. waitAfter 12 hours
  6. concentrationthe solvent was concentrated
  7. customthe residue purified via column chromatography (SiO2, 3:1 Hexane:Ether→20:1 CH2Cl2:Acetone)
  8. customto afford a colorless solid, which
  9. customwas used without further purification (12.3 mg, 14%)
  10. waitAfter 48 hours
  11. concentrationthe solvent was concentrated
  12. customthe residue purified via column chromatography (SiO2, 40:1 CH2Cl2:Acetone)

Sources & evidence

ORD record
ord-b878a3c1bf0f4a22aff2243056f4c6e9
Source dataset
uspto-grants-2012_07
Patent number
US08212011B2

Reaction notes

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