Journal of the Chemical Society. Perkin transactions I p. 653 - 656 (1981)
Update date:2022-09-26
Topics:
Maddocks, Peter J.
Pelter, Andrew
Rowe, Keith
Smith, Keith
Subrahmanyam, Chitti
Dialkylbromoboranes react steadily with hydroxide-free sodium hydride in diglyme, in the presence of alkenes, to give nearly quantitative yields of partly mixed trialkylboranes.The reaction proceeds too slowly to allow prior clean preparation of dialkylboranes, so reaction in the presence of alkenes possessing hydride-sensitive functional groups is not possible, although terminal alkynes can be hydroborated in situ by a modified experimental procedure.Potassium hydride reacts much more rapidly with dialkylbromoboranes, the reactions being complete within minutes at 20 deg C, but the yields are lower.Addition of dibenzo-18-crown-6 leads to an increase in yield but the results are still inferior to those obtained using sodium hydride.Reaction of dialkylbromoboranes with lithium hydride is very sluggish.
View MoreChangsha Yihai Chemical Technology Co.,ltd
Contact:0731- 85620465
Address:Room 23005, unit 2, the northern building of Xiangsong international building , NO.259 Shaoshan Road , Changsha , Hunan, China.(mainland)
Jiangxi Sunway Chemical Co. Ltd.
Contact:86-794-5259909
Address:Zone C Industry Park Jinxi
Nanjing Hemings New Material Tech Co.,Ltd.
Contact:+86-25-86606739
Address:NO.186 Jiangdong Mid Road,Nanjing China
Weifang Dongxing Chitosan Factory
website:http://dxchitosan.lookchem.com/
Contact:13475651157
Address:Weifang city ,shandong province
Hebei Lead Bio-Chemicals Co., Ltd.
website:http://www.ldbiochem.com
Contact:+86-311-87826503
Address:481, Heping West Road, Shijiazhuang,China
Doi:10.1021/jo01295a042
(1980)Doi:10.1039/a804956d
(1998)Doi:10.1016/j.jorganchem.2012.05.040
(2012)Doi:10.1021/acs.orglett.6b01078
(2016)Doi:10.1021/ic50208a016
(1980)Doi:10.1055/s-0029-1216790
(2009)
