Thiazole-4-carboxaldehyde → Azd-7268

HRID 1442668Notes

Reaction equation

HRID 1442668 reaction equation
[OH:1][CH2:2][CH2:3][N:4]([CH3:30])[C:5](=[O:29])[C:6]1[CH:11]=[CH:10][C:9]([C:12](=[C:23]2[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]2)[C:13]2[CH:14]=[CH:15][CH:16]=[C:17]3[C:22]=2[N:21]=[CH:20][CH:19]=[CH:18]3)=[CH:8][CH:7]=1.[S:31]1[CH:35]=[C:34]([CH:36]=O)[N:33]=[CH:32]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClC(Cl)C.C(Cl)Cl>[OH:1][CH2:2][CH2:3][N:4]([CH3:30])[C:5](=[O:29])[C:6]1[CH:7]=[CH:8][C:9]([C:12]([C:13]2[CH:14]=[CH:15][CH:16]=[C:17]3[C:22]=2[N:21]=[CH:20][CH:19]=[CH:18]3)=[C:23]2[CH2:28][CH2:27][N:26]([CH2:36][C:34]3[N:33]=[CH:32][S:31][CH:35]=3)[CH2:25][CH2:24]2)=[CH:10][CH:11]=1

Participants

6

Reactant 3

HCID 2763214Thiazole-4-carboxaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 248976691018987-99-9

Product 1

HCID 24772484Azd-7268Yield 49%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 63651,1-DichloroethaneSolvent

Procedure

Compound 1C (3.3 g, 8.3 mmol) and 4-thiazolecarboxaldehyde (1.4 g, 12.4 mmol) in dichloroethane (16 mL) were stirred for 30 min. under nitrogen. Sodium triacetoxyborohydride (5.3 g, 24.9 mmol) was added and the reaction was stirred for 20 h. The mixture was diluted with CH2Cl2 (20 mL) and washed with saturated aqueous NaHCO3. The organic phase was dried over Na2SO4 and concentrated. Column chromatography (120 g silica gel, eluting with 4% 7N NH3/MeOH in CH2Cl2) gave 2.01 g 1D as a white solid (49%). 1H NMR (500.333 MHz, CDCl3) δ 8.90 (dd, J=4.1, 1.7 Hz, 1H), 8.76 (d, J=1.9 Hz, 1H), 8.11 (dd, J=8.0, 1.5 Hz, 1H), 7.72 (dd, J=7.3, 2.3 Hz, 1H), 7.51-7.46 (m, 2H), 7.37-7.33 (m, 3H), 7.31-7.29 (m, 2H), 7.18 (s, 1H), 3.85 (s, br, 2H), 3.76 (s, 2H), 3.67 (br s, 2H), 3.26 (br s, 1H), 3.02 (s, 3H), 2.78-2.71 (m, 1H), 2.67-2.52 (m, 4H), 2.46-2.37 (m, 1H), 2.14-2.04 (m, 2H). TOF MS E+499.21.

Workup

  1. washwashed with saturated aqueous NaHCO3
  2. dry with materialThe organic phase was dried over Na2SO4
  3. concentrationconcentrated
  4. washColumn chromatography (120 g silica gel, eluting with 4% 7N NH3/MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-afc29d1823894e51b1e76efb15acb294
Source dataset
uspto-grants-2010_02
Patent number
US07659286B2

Reaction notes

Loading…