Thiophenol → Amino-noscapine

HRID 2408264Notes

Reaction equation

HRID 2408264 reaction equation
Cl[Sn]Cl.C1(S)C=CC=CC=1.C1(N(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[N:30]([C:33]1[C:34]2[CH2:35][CH2:36][N:37]([CH3:62])[C@@H:38]([C@@H:48]3[C:56]4[C:51](=[C:52]([O:59][CH3:60])[C:53]([O:57][CH3:58])=[CH:54][CH:55]=4)[C:50](=[O:61])[O:49]3)[C:39]=2[C:40]([O:46][CH3:47])=[C:41]2[O:45][CH2:44][O:43][C:42]=12)=[N+]=[N-]>C1COCC1>[CH3:62][N:37]1[C@@H:38]([C@H:48]2[O:49][C:50](=[O:61])[C:51]3[C:52]([O:59][CH3:60])=[C:53]([O:57][CH3:58])[CH:54]=[CH:55][C:56]2=3)[C:39]2[C:40]([O:46][CH3:47])=[C:41]3[O:45][CH2:44][O:43][C:42]3=[C:33]([NH2:30])[C:34]=2[CH2:35][CH2:36]1

Participants

6

Reactant 4

HCID 7969ThiophenolHCID 11775TriphenylamineHCID 24479Stannous ChlorideHCID 86659030(S)-3-((R)-9-azido-4-methoxy-6-methyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinolin-5-yl)-6,7-dimethoxyisobenzofuran-1(3H)-one

Product 1

HCID 46175165Amino-noscapine

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a 50-mL of round-bottomed flask containing a solution of SnCl2 in THF (10 mL) were added thiophenol and triphenylamine. The reaction mixture was added slowly to a solution of azido-noscapine (3, 0.2 g, 0.440 mmol) in THF (5 mL) and the reaction mixture stirred at room temperature. The reaction progress was monitored by thin-layer chromatography at 30 minutes intervals. The reaction was found to be completed after 2 h, the solvent was removed in vacuo. The residue was diluted with chloroform (20 ml) and was added sodium hydroxide solution (20 mL). the aqueous phase was separated and extracted with chloroform (2×20 mL). the combined organic phase was dried over sodium sulfate and concentrated to obtain amino-noscapine as colorless oil, which was then treated with ethereal HCl to obtain its salt as white crystals. Yield, 83%; mp (HCl. Salt) 112.2-112.6° C.; IR: 1725, 1362 cm−1; 1H NMR (CDCl3, 400 MHz): δ 7.12 (d, 1H, J=7.4.0 Hz), 7.02 (d, 1H, J=7.4 Hz), 6.02 (s, 2H), 5.92 (d, 1H, J=4.0 Hz), 4.42 (d, 1H, J=4.0 Hz), 4.20 (bs, 2H), 4.02 (s, 3H), 3.85 (s, 3H), 3.80 (s, 3H), 2.74-2.64 (m, 2H), 2.61-2.56 (m, 2H), 2.52 (s, 3H); 1H NMR (CDCl3+D2O, 400 MHz): δ 7.12 (d, 1H, J=7.4.0 Hz), 7.02 (d, 1H, J=7.4 Hz), 6.02 (s, 2H), 5.92 (d, 1H, J=4.0 Hz), 4.42 (d, 1H, J=4.0 Hz), 5.12 (bs, confirms NH2 group), 4.02 (s, 3H), 3.85 (s, 3H), 3.80 (s, 3H), 2.74-2.64 (m, 2H), 2.61-2.56 (m, 2H), 2.52 (s, 3H); 13C NMR (CDCl3, 100 MHz): δ 169.5, 156.8, 152.6, 147.8, 142.7, 141.8, 135.0, 134.2, 123.2, 120.8, 119.9, 119.4, 114.1, 100.8, 87.6, 63.7, 56.8, 56.4, 56.1, 51.4, 39.2, 27.5; HRMS (ESI): m/z Calcd. for C22H24N2O7 (M+1), 428.3481; Found, 428.1562 (M+1).

Workup

  1. waitto be completed after 2 h
  2. customthe solvent was removed in vacuo
  3. additionThe residue was diluted with chloroform (20 ml)
  4. additionwas added sodium hydroxide solution (20 mL)
  5. customthe aqueous phase was separated
  6. extractionextracted with chloroform (2×20 mL)
  7. dry with materialthe combined organic phase was dried over sodium sulfate
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-1f7b9d70a8674372819e26ae8364aefe
Source dataset
uspto-grants-2014_08
Patent number
US08815835B2

Reaction notes

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