Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 157335-97-2, name is 5-Bromo-4,6-dimethylpyrimidine. This compound has unique chemical properties. The synthetic route is as follows. Product Details of 157335-97-2
1, 1?-Bis(diphenylphosphino)ferrocene]dichloropalladium(ll)-dichloromethanecomplex (5 g, 6 mmol) was added to a degassed mixture of 2-(4-methoxy-2- methylphenyl)-4,4,5,5-tetramethyl-1 ,3,2-dioxaborolane (30 g, 120 mmol), 5-bromo-4,6- dimethylpyrimidine (22.5 g, 120 mmol), and potassium phosphate (76.3 g, 359 mmol) in 1,4-dioxane (300 mL) and water (150 mL). The reaction mixture was heated at reflux for4 hours, whereupon it was filtered and concentrated in vacuo. Purification via silica gel chromatography (Gradient: ethyl acetate in petroleum ether) provided the product as a brown solid. Yield: 25 g, 110 mmol, 92%. LCMS m/z229.3 [M+H]. 1H NMR (300 MHz, ODd3) oe 8.95 (5, 1H), 6.94 (d, J=8.2 Hz, 1H), 6.87-6.89 (m, 1H), 6.84 (dd, J=8.3, 2.5 Hz, 1H), 3.86 (5, 3H), 2.21 (5, 6H), 1.99 (5, 3H).
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Reference:
Patent; PFIZER INC.; GRAY, David Lawrence Firman; DAVOREN, Jennifer Elizabeth; DOUNAY, Amy Beth; EFREMOV, Ivan Viktorovich; MENTE, Scot Richard; SUBRAMANYAM, Chakrapani; WO2015/166370; (2015); A1;,
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