Dibrominated addition and substitution of alkenes catalyzed by Mn<sub>2</sub>(CO)<sub>10</sub>
作者:Xianheng Song、Shanshui Meng、Hong Zhang、Yi Jiang、Albert S. C. Chan、Yong Zou
DOI:10.1039/d1cc04534b
日期:——
A practical method for the dibromination of alkenes without using molecular bromine is consistently appealing in organic synthesis. Herein, we report Mn-catalyzed dibrominated addition and substitution of alkenes only with N-bromosuccinimide, producing a variety of synthetically valuable dibrominated compounds in moderate to high yields.
Solvent-free bromination reactions with sodium bromide and oxone promoted by mechanical milling
作者:Guan-Wu Wang、Jie Gao
DOI:10.1039/c2gc16606b
日期:——
New solvent-free brominations of 1,3-dicarbonyl compounds, phenols, various alkenes including chalcones, azachalcones, 4-phenylbut-3-en-2-one, methyl cinnamate, styrene and 1,3-cyclohexadiene were efficiently achieved by employing sodium bromide and oxone under mechanical milling conditions. The brominated products were obtained in good to excellent yields.
NMR structural elucidation and photochromic behavior of new 1,3-diazabicyclo[3.1.0]hex-3-ene derivatives
作者:N. O. Mahmoodi、H. Kiyani、K. Tabatabaeian、M. A. Zanjanchi、M. Arvand、B. Sharifzadeh
DOI:10.1134/s1070428010060175
日期:2010.6
Several 6-(4-nitrophenyl)-4-phenyl-1,3-diazabicyclo[3.1.0]hex-3-ene derivatives having various substituents on C2 were synthesized, and their 1H NMR spectra and photochromic behavior were examined.
合成了几种在C 2上具有各种取代基的6-(4-硝基苯基)-4-苯基-1,3-二氮杂双环[3.1.0]己-3-烯衍生物,并对其1 H NMR光谱和光致变色行为进行了研究。
Darstellung, NMR- und IR-spektren von 2,3-dibrom- und 2-jod-3-chlor-1,3-diphenylpropanonen-(1)
作者:F.G. Weber
DOI:10.1016/s0040-4020(01)82967-7
日期:1969.1
Reaction of IC1 with chalcones yielded 2-iodo-3-chloro-1,3-diphenylpropanones-(1) (II), which were identified by their 1H-NMR spectra as erythro isomers. The IR spectra of the II were compared with the IR spectra of the 2,3-dibromo compounds (I) in the range of 400 to 700 cm−1 and in the carbonyl frequency region.
Catalyst-Free 1,2-Dibromination of Alkenes Using 1,3-Dibromo-5,5-dimethylhydantoin (DBDMH) as a Bromine Source
作者:Lei Wang、Lele Zhai、Jinyan Chen、Yulin Gong、Peng Wang、Huilin Li、Xuegong She
DOI:10.1021/acs.joc.1c02906
日期:2022.3.4
source. This reaction proceeds under mild reaction conditions without the use of a catalyst and an external oxidant. Various sorts of alkene substrates are transformed into the corresponding 1,2-dibrominated products in good to excellent yields with broad substrate scope and exclusive diastereoselectivity. This method offers a green and practical approach to synthesize vicinaldibromide compounds.