Reference of 1439-09-4, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.1439-09-4, name is 5-Bromo-4-methylpyrimidine, molecular formula is C5H5BrN2, molecular weight is 173.01, as common compound, the synthetic route is as follows.
Preparation 4A: 4-Methyl-5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)pyrimidine[00135] Nitrogen was bubbled into a mixture of 5-bromo-4-methylpyrimidine (0.100 g, 0.578 mmol), 4,4,4′,4′,5,5,5′,5′-octamethyl-2,2′-bi(l,3,2-dioxaborolane) (0.191 g, 0.751 mmol), and potassium acetate (0.129 g, 1.316 mmol) in DMSO (2.89 mL) for 10 min. Then 1 , 1 ‘-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex (0.019 g, 0.024 mmol) was added and the reaction mixture was heated at 90 C overnight. The reaction was quenched with FLO. The reaction mixture was extracted with EtOAc (3X). The organic phases were combined, dried over Na2S04, filtered, and concentrated to afford the title compound (127 mg, 100%) as a dark brown residue.
Statistics shows that 1439-09-4 is playing an increasingly important role. we look forward to future research findings about 5-Bromo-4-methylpyrimidine.
Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; BALOG, James Aaron; HUANG, Audris; VELAPARTHI, Upender; LIU, Peiying; WO2013/49263; (2013); A1;,
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia