Journal of the American Chemical Society p. 1838 - 1840 (1984)
Update date:2022-08-16
Topics:
Skell, P. S.
Walling, El-Taliawi, and Zhao claim that our "S? chemistry" is reproduced in photobrominations employing Br2 in the presence of carbonyl compounds (no NBS).Photobromination of alkanes by N-bromosuccinimide (NBS) shows selectivities that vary, but which show limiting values for significant ranges of rection conditions.We have attributed these different limiting values to three reaction paths which differ in involving either Br., S?, or S? as the intermediate hydrogen-abstracting radical.Walling, El-Taliawi, and Zhao (WEZ) have reported selectivities they belive are attributable to a carbonyl-bromine intermediate rather than our S?.Evidence is now presented to show that the WEZ results are due to HBr in varying amounts with or without carbonyl compounds present.This represents a fourth type of selectivity and one that is sensitive to HBr concentrations and probably arises in their systems from the following reaction:
Suzhou Jingye Medicine & Chemical Co., Ltd
website:http://www.jingyechem.cn
Contact:+86-512-66658588
Address:No. 88, Sanlian Street, Jinfeng Road, Suzhou New District, Jiangsu Province, P. R. China
website:http://www.chinaskyrun.com
Contact:0086-576-84610586
Address:Chemical Development Zone
Dalian Synco Chemical Co., Ltd.
Contact:+86-411-83635150
Address:Rm 1004, 24, Tangshan Street, Dalian
Jining tiansheng chemical co.,ltd.
Contact:+86-537-5158722
Address:ROOM 1011, BLOCK B, CUIDU INTERNATIOAL BUSINESS CENTER, JINING CITY, CHINA
Contact:15973022782
Address:7-5-6218,Incubation Centre,Guandong Industry Park, East Lake High-Tech Development Zone,Wuhan City.
Doi:10.1002/ejic.200390027
(2003)Doi:10.1002/hlca.200590150
(2005)Doi:10.1039/c9cc09901h
(2020)Doi:10.1002/aoc.4108
(2018)Doi:10.1021/jm900230j
(2009)Doi:10.1055/s-2007-967979
(2007)