Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 131818-17-2, name is tert-Butyl (4-bromophenyl)carbamate, A new synthetic method of this compound is introduced below., Product Details of 131818-17-2
b) tert-butyl N-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]carbamate A mixture of tert-butyl N-[(4-bromophenyl)carbamate (5.95 g, 0.0219 mol), diboron pinacol ester (6.67 g, 0.0263 mol), [1.1′-bis(diphenylphosphino)ferrocene]-dichloropalladium (II) complex with dichloromethane (1:1) (0.536 g, 0.00066 mol) and potassium acetate (6.47 g, 0.066 mol) in N,N-dimethylformamide (120 mL) was heated at 80 C. under an atmosphere of nitrogen for 16 hours. The mixture was allowed to cool to ambient temperature and the solvent removed under reduced pressure. Dichloromethane (100 mL) was added to the residue and the resulting solid was removed by filtration through a pad of Celite. The filtrate was concentrated to leave a yellow oil which was purified by flash chromatography on silica using ethyl acetate/n-heptane (7:93) as mobile phase. The resulting fractions were concentrated, the residue was triturated in n-heptane and the precipitate collected by filtration to yield tert-butyl N-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]carbamate (6.0 g, 0.0188 mol) as a white solid. 1H NMR (DMSO-d6, 400 MHz) delta 9.50(s, 1H), 7.55 (d, 2H), 7.46 (d, 2H), 1.47 (s, 9H), 1.27 (s, 12H).
The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.
Reference:
Patent; Abbott Laboratories; US6921763; (2005); B2;,
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