C–H Xanthylation: A Synthetic Platform for Alkane Functionalization
作者:William L. Czaplyski、Christina G. Na、Erik J. Alexanian
DOI:10.1021/jacs.6b09414
日期:2016.10.26
Intermolecular functionalizations of aliphatic C-H bonds offer unique strategies for the synthesis and late-stage derivatization of complex molecules, but the chemical space accessible remains limited. Herein, we report a transformation significantly expanding the chemotypes accessible via C-Hfunctionalization. The C-Hxanthylation proceeds in useful chemical yields with the substrate as the limiting
脂肪族CH键的分子间官能化为复杂分子的合成和后期衍生化提供了独特的策略,但可利用的化学空间仍然有限。在此,我们报告了一种显着扩展可通过 CH 功能化获得的化学型的转化。使用蓝色 LED 和易于制备的 N-黄基酰胺,以底物作为限制试剂,CH 黄基化反应以有用的化学产率进行。复杂分子的后期官能化以高水平的位点选择性发生,并且反应中可以容忍各种常见的官能团。这种方法利用黄原酸酯官能团通过极性和自由基流形的多功能性来解锁以前在合成中无法实现的各种CH转换。
A Convenient Synthesis of Sulfones Using Zinc Mediated Coupling Reaction of Sulfonyl Chlorides with Alkyl Halides in Aqueous Media
作者:Xinghua Sun、Lei Wang、Yongmin Zhang
DOI:10.1080/00397919808007009
日期:1998.5
Abstract An efficient procedure for the preparation of sulfones has been developed through a simple reaction of aromatic sulfonyl chlorides with suitable alkyl halides mediated by commercial zinc powder in aqueous media at 0 °C ∼ room temperature.
摘要 通过在水性介质中,在 0 °C ~ 室温下,在商业锌粉的介导下,芳族磺酰氯与合适的卤代烷进行简单反应,开发了一种有效的制备砜的方法。
Eosin-Mediated Alkylsulfonyl Cyanation of Olefins
作者:Vincent Pirenne、Gülbin Kurtay、Silvia Voci、Laurent Bouffier、Neso Sojic、Frédéric Robert、Dario M. Bassani、Yannick Landais
DOI:10.1021/acs.orglett.8b01828
日期:2018.8.3
Eosin-Y (EY)-mediated alkylsulfonyl cyanation of olefins was shown to afford alkylsulfonyl nitriles in good yields. On the basis of transient absorption spectroscopy, the reaction was shown to proceed via photoinduced electron transfer from 3EY* to an O-cyanated derivative of the photocatalyst, formed in situ, with generation of the corresponding sulfinate that is oxidized by EY•.+ into a sulfonyl
曙红-Y(EY)介导的烯烃烷基磺酰基氰化反应显示出可提供高收率的烷基磺酰基腈。根据瞬态吸收光谱法,反应通过光致电子从3 EY *转移至原位形成的光催化剂的O氰化衍生物而进行,并生成了被EY •氧化的亚磺酸盐。变成磺酰基。将后者加到烯烃上,然后进行自由基氰基基团转移,然后将腈与维持自由基链的RSO 2自由基一起提供。
SO<sub>2</sub> conversion to sulfones: development and mechanistic insights of a sulfonylative Hiyama cross-coupling
作者:Aurélien Adenot、Joëlle Char、Niklas von Wolff、Guillaume Lefèvre、Lucile Anthore-Dalion、Thibault Cantat
DOI:10.1039/c9cc06858a
日期:——
A Pd-catalyzed Hiyama cross-coupling reaction using SO2 is described.
一种使用二氧化硫的Pd催化Hiyama交叉偶联反应被描述。
One-pot synthesis of symmetric 1,7-dicarbonyl compounds via a tandem radical addition–elimination–addition reaction
作者:Zhongyan Huang、Jiaxi Xu
DOI:10.1039/c3ra42932f
日期:——
A novel approach to synthesize symmetric 1,7-dicarbonyl compounds via a tandem radical additionâeliminationâaddition reaction of S-carbonylmethyl xanthates with allylmethylsulfone and its analogues has been developed. Radicals were produced from S-carbonylmethyl xanthates by adding dilauroyl peroxide and reacted with allylmethylsulfone or analogues to generate terminal olefins as intermediates. The excessive radicals reacted with the intermediate olefins immediately to give adducts of symmetric 1,7-dicarbonyl compounds. This is an efficient method to synthesize 1,7-dicarbonyl compounds under mild conditions.