SYNTHESIS AND C-S BOND FISSION OF 1,3-DIARYL-3-THIOGLYCOLIC ACID-1-PROPANONES
摘要:
1,3-Diaryl-3-thioglycolic acid-1-propanones 3a-k have been synthesized by the reaction of either erythro-2,3-dibromo-1,3-diaryl-1-propanones 1a-k or their corresponding trans-chalcones 2(a-k) with disodio-thioglycolate in absolute ethanol. The structure of the products was proven by UV, IR, NMR spectra and elemental analysis. A reaction mechanism leading to the products, and the carbon-sulfur bond fission in alkaline medium were discussed.
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.
I2O5-mediated bromohydroxylation and dibromination of olefins using KBr in water
作者:Yajun Wang、Jinxi Wang、Yun Xiong、Zhong-Quan Liu
DOI:10.1016/j.tetlet.2014.03.064
日期:2014.4
An efficient and green bromohydroxylation and dibromination of various olefins mediated by I2O5 has been developed in this work. A series of olefins gave the corresponding α-bromo-alcohols and dibromides as the major products using KBr as the brominating reagent in aqueous medium at room temperature. The diastereo- and regio-selectivities are extremely high.
在这项工作中,已经开发了由I 2 O 5介导的各种烯烃的有效且绿色的溴羟基化和二溴化。在室温下,在水介质中使用KBr作为溴化试剂,一系列烯烃得到了相应的α-溴代醇和二溴化物作为主要产物。非对映选择性和区域选择性非常高。
THE ACTION OF BASES ON ALPHA,BETA-DIBROMO KETONES AND RELATED SUBSTANCES
作者:E. P. Kohler、C. R. Addinall
DOI:10.1021/ja01372a048
日期:1930.9
v. Auwers; Seyfried, Justus Liebigs Annalen der Chemie, 1930, vol. 484, p. 194,212