Regioselective One-Pot Bromination of Aromatic Amines<sup>1</sup>
作者:Michael B. Smith、Lisa (Chen) Guo、Sherrad Okeyo、Jason Stenzel、James Yanella、Eric LaChapelle
DOI:10.1021/ol0259600
日期:2002.7.1
tin amide, reaction with bromine and workup with aqueous fluoride ion gave p-bromoaniline in 76% yield, with no dibromoaniline or o-bromoaniline. Application of this sequence to 11 different aromaticamines gave selectivebromination in 36-91% yields, without formation of dibromides. This constitutes a good general method for the regioselective bromination of aromaticamines.
Kolodiazhnyi, Oleg I.; Golovatyi, Oleg R., Phosphorus, Sulfur and Silicon and the Related Elements, 1995, vol. 102, # 1-4, p. 133 - 142
作者:Kolodiazhnyi, Oleg I.、Golovatyi, Oleg R.
DOI:——
日期:——
Room-temperature growth of ferroelectric diisopropylammonium bromide with 12-crown-4 addition
作者:Kaige Gao、Chuang Liu、Zepeng Cui、Jiansheng Zhu、Hong-Ling Cai、X. S. Wu
DOI:10.1039/c4ce02567a
日期:——
Diisopropylammonium bromide (DIPAB) is reported to be ferroelectric with a spontaneous polarization of 23 μC cm−2 above room temperature, which is close to that of BaTiO3. However, it is difficult to grow single crystals of DIPAB with a ferroelectric phase at room temperature. Here, a solution method using 12-crown-4 as an additive in solvent is found to easily obtain ferroelectric DIPAB single crystals. It indicates that the addition of 12-crown-4 facilitates the crystallization of a ferroelectric DIPAB crystal. Ferroelectric DIPAB's pyroelectric coefficient measured by dynamic pyroelectric current is about 65–325 μC m−2 K−1 at room temperature, which reveals that DIPAB is a good candidate for infrared detectors. Therefore, this modified method is very useful to grow ferroelectric DIPAB and its derivative.