成人免费xx,国产又黄又湿又刺激不卡网站,成人性视频app菠萝网站,色天天天天

Welcome to chemicalbook!
Chinese English Japanese Germany Korea
400-158-6606
Try our best to find the right business for you.
Do not miss inquiry messages Please log in to view all inquiry messages.

Welcome back!

36204-76-9

3-AMINO-N-METHYLPYRAZINE-2-CARBOXAMIDE synthesis

3synthesis methods
-

Yield:-

Reaction Conditions:

with benzotriazol-1-ol;1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride;N-ethyl-N,N-diisopropylamine in N,N-dimethyl-formamide at 20; for 48 h;

Steps:

91

Example 91; 7V-Methyl-3-(2-(2-oxoindolin-5-ylamino)-5-(trifluoromethyl)pyridin-4-ylamino)pyrazine-2-carboxamide; 3-Amino-λ'-methylpyrazine-2-carboxamide; A mixture of 3-aminopyrazine-2-carboxylic acid (965 mg, 6.94 mmol), methylamine hydrochloride (697 mg, 10.3 mmol), EDCI (1.61 g, 8.4 mmol), HOBt (1.136 g, 8.4 mmol) and DIEA (2.42 mL, 13.9 mmol) in DMF (24 mL) was stirred at room temperature for 48 h. It was diluted with ethyl acetate and washed with saturated sodium bicarbonate, brine and dried over magnesium sulfate. The solvent was removed and the residue was purified by silica gel chromatography (combiflash- companion; DCM/MeOH gradient) to give the title compound.

References:

WO2008/115369,2008,A2 Location in patent:Page/Page column 132-133

3-AMINO-N-METHYLPYRAZINE-2-CARBOXAMIDE Related Search: