89622-17-3Relevant academic research and scientific papers
Metal-free desulfonylation reaction through visible-light photoredox catalysis
Yang, Deng-Tao,Meng, Qing-Yuan,Zhong, Jian-Ji,Xiang, Ming,Liu, Qiang,Wu, Li-Zhu
, p. 7528 - 7532 (2013/12/04)
The desulfonylation of β-arylketosulfones has been achieved in good to excellent yields by using 3-W blue LEDs light, 1 mol-% organic dye eosin Y bis(tetrabutylammonium salt) as photocatalyst, and diisopropylethylamine as reducing agent. Mechanistic studies demonstrate that oxidative quenching of the excited eosin Y by β-arylketosulfones plays a crucial role in the present photoredox catalytic cycle. Reductive desulfonylation is essential to enable to use of a sulfone as an auxiliary group. For reductive removal of sulfones, highly aggressive metal-containing reducing agents and harsh reaction conditions are often employed. In this paper, metal-free desulfonylation of β-arylketosulfones can be achieved efficiently at room temperature under visible-light irradiation.
Homoisoflavones: Part V - Bromination of 3-Benzylchroman-4-ones
Chatterjea, J. N.,Singh, R. P.,Jha, I. S.,Shaw, S. C.
, p. 923 - 924 (2007/10/02)
Bromination of 3-benzylchroman-4-ones (IIa-e) with cupric bromide or phenyltrimethylammonium perbromide affords the 3-bromo derivatives (IIIa-e) which have been conveniently converted into homoisoflavones (Va-e).) Bromination of IIa-e with N-bromosuccinim
