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To a solution of 4,5~dimethyl-ihiazo3-2-ylamine hydrochloride (1 65 g, 10 0 mmol) in TetaF (100 mL) was added tiiethylamine (4 2 mL, 30 mmol) and adamantane-l-carbonyl chloride (2 2 g, 1 1 mmol) The mixture was heated at reflux overnight and then concentrated under reduced pressure The residue was diluted with ethyl acetate, washed with IM NaHCO3, dried (Na2SO4), filtered and concentrated Purification by column chromatography (SiO2, 10 %ethyl acetate: 90% hexanes) afforded 2 15 g (74%) of the title compound MS (ESI+) m/z 291 (M+H)+
N-[(4,5-dimethyl-1,3-thiazol-2-yl)carbamoyl]-3-methylbenzenesulfonamide[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
55%
m-Toluenesulfonyl chloride (0.076 ml, 0.53 mmol, 1.4 equiv.) and pyridine (0.103 ml, 1.27 mmol, 3.4 equiv.) were added to a stirred suspension of sodium cyanate (56 mg, 0.86 mmol, 2.3 equiv.) in dry acetonitrile (1 ml) and the mixture stirred at room temperature for 3 hours. 2-Amino-4,5-dimethylthiazole hydrochloride (34 mg, 0.28 mmol, 1.0 equiv.) was added and the reaction stirred for 1 hour. Water (2 ml) and acetic acid (3 drops) were added. The resulting precipitate was centrifuged for 10 minutes and the supernatant decanted. The solid washed with water (2 ml), the material centrifuged and supernatant decanted. The solid was dried under reduced pressure at 40 C. to give N-[(4,5-dimethyl-1,3-thiazol-2-yl)carbamoyl]-3-methylbenzenesulfonamide, 49 mg (55% yield). LC aUV215 nm; Rt 1.81: 93%, m/z (ES+): 326 (MH+), 651 (2 MH+); deltaH(400 MHz; d4-methanol) 7.54-7.98 (4H, m), 2.57 (3H, s), 2.31 (3H, s), 2.27 (3H, s).
2-[(N-diethylphosphonoacetyl)amino]-4,5-dimethylthiazole[ No CAS ]
Yield
Reaction Conditions
Operation in experiment
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; In N,N-dimethyl-formamide; at 20℃; for 24h;
Step M. A solution of <strong>[71574-33-9]2-amino-4,5-dimethylthiazole hydrochloride</strong> (2 mmole) and diethyl phosphonoacetica acid (1 mmole) in DMF (5 ML) was treated with EDCI (1.5 mmole), HOBt (1.5 mmole) and triethylamine (2 mmole) at room temperature for 24 h.. The reaction was subjected to evaporation, extraction and chromatography to give 2-[(N-diethylphosphonoacetyl)amino]-4,5-dimethylthiazole as a yellow solid, which was subjected to Step D of Example 18 followed by Step C of Example 3 to give 4,5-dimethyl-2-[(N-phosphonoacetyl)amino]thiazole (18.7) as a light brown solid. Mp>250 C. Anal. Calcd. for C7H11N2O4PS: C: 33.60; H: 4.43; N: 11.20. Found: C: 33.62; H: 4.29; N: 10.99.
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