A group effort: Reported is the title reaction using a polycomponent catalytic system involving commercially available Selectfluor, a putative radical precursor N‐hydroxyphthalimide, an anionic phase‐transfer catalyst (KB(C6F5)4), and a copper(I) bis(imine). The catalyst system formed leads to monofluorinated compounds selectively (see example) without the necessity for an excess of the alkane substrate
共同努力:报告为使用多组分催化体系的标题反应,涉及可商购的Selectfluor,推定的自由基前体N-羟基邻苯二甲酰亚胺,阴离子相转移催化剂(KB(C 6 F 5)4)和铜(I)二(亚胺)。形成的催化剂体系选择性地产生单氟化化合物(参见实施例),而无需过量的烷烃底物。
Alicyclic Ring Structure: Conformational Influence of the CF2 Group in Cyclododecanes
作者:Maciej Skibinski、Yi Wang、Alexandra M. Z. Slawin、Tomas Lebl、Peer Kirsch、David O'Hagan
DOI:10.1002/anie.201105060
日期:2011.11.4
Getting out of the way: In fluorinated cyclododecane structures the CF2 group locates only at corner positions (see picture). This relaxes 1,4‐H,H transannular interactions as a result of C‐CF2‐C angle widening. Misplaced CF2 groups lead to significant ring distortion. It follows that strategic incorporation of CF2 groups has potential as a design feature to introduce order and polarity into organic
gem-Difluorination of 1,3-dithiolanes with the hexafluoropropene-diethylamine reagent and N-iodosuccinimide or 1,3-dibromo-5,5-dimethylhydantoin
作者:Makoto Shimizu、Takashi Maeda、Tamotsu Fujisawa
DOI:10.1016/0022-1139(94)03187-5
日期:1995.3
gem-Difluoro compounds are readily prepared from 1,3-dithiolanes in good yield on treatment with hexafluoropropene-diethylamine/1,3-dibromo-5,5-dimethylhydantoin or /N-iodosuccinimide/water.