E-Z Isomerization of 1, 5-Bromotrichloromethylation Reaction Products and Trisubstituted Styrenes

Structural analysis of mono-substituted N-butyl-pyridinium salts: in search of ionic liquids

“…The anti torsion angles are unique for the [b3mpy] þ cation. This conformation has been observed in the structure of catena-(bis(N-n-butyl-2-methylpyridinium) hexakis(l 2 -iodo)-di-lead(II) dimethylformamide solvate monohydrate [43]. However, the structure of catena-[tris(N-butyl-2-methylpyridinium) (l 4 -iodo)-tetrakis(l 3 -iodo)-tetrakis(l 2 -iodo)-hexa-silver(I)] reported later [44] has three unique cations in the asymmetric unit, two of which display gauche conformation and one that displays the anti conformation.…”

“…An overview of the butyl tail conformations of the cations of [b4dmapy]Cl, [b4mpy]Br, [b4mpy][PF 6 ], and [b3mpy][PF 6 ] viewed from above (a, b,c, and d, respectively) and from the side (aa, bb, cc, and dd, respectively). Below these are structures taken from the literature of the cations of 1-butylpyridinium chloride (e, ee)[29], 1-butylpyridinium bromide (f, ff)[32], bis(1-n-butyl-4methylpyridinium) tetrachloropalladate(II) (g, gg, h, hh)[42], catena-(bis(N-n-butyl-2-methylpyridinium) hexakis(l 2 -iodo)-di-lead(II) dimethylformamide solvate monohydrate) (i, ii)[43], and catena-[tris(N-butyl-2-methylpyridinium) (l 4 -iodo)-tetrakis(l 3 -iodo)-tetrakis(l 2 -iodo)-hexa-silver(I)] (j, jj, k, kk)[44]. The torsion angles in the butyl tails, as well as, the N1-C7-C10 angle (h) for (a) through (d) are given in Table2.…”

Visible Light-Promoted Isomerization of Alkenes

“…在前期成功实现多氟芳烃烷 基化和芳基化 [30] 的基础上, 他们使用相同的策略, 在可 见光的激发下, 使用多氟芳烃自由基对取代炔烃 46 加 成得到骨架多样的烯基化多氟芳烃化合物, 并且通过对 光催化剂的筛选来实现对烯基化产物立体选择性的控 制 [31] . 程旭等 [35] 报道了一种取代苯乙烯的 1,5-溴三氯甲基 化 反 应 , 并 对 产 物 的 构 型 进 行 了 立 体 选 择 性 控 制 (Scheme 22…”

Radical 1,5-Chloropentafluorosulfanylation of Unactivated Vinylcyclopropanes and Transformation into α-SF5 Ketones

“…In sharp contrast, unactivated VCPs lacking EWS less favorably form 1,3-dipoles in the presence of metal catalysts and prefer to undergo oxidative addition to form a metallacycle intermediate for subsequent annulation reactions . Unactivated VCPs, as five-carbon synthons, were explored in a number of transition-metal-catalyzed 1,5-difunctionalization reactions, e.g., Ni-catalyzed silaboration, Fe-catalyzed hydroboration, Fe-catalyzed dicarbofunctionalization, Rh-catalyzed nitrene-transfer, Cu-catalyzed cyanotrifluoromethylation, Au-catalyzed hydroamination, and Ir-catalyzed bromotrichloromethylation . In addition, an organocatalytic (C 6 F 5 ) 3 B-catalyzed ionic hydrosilylation and a visible-light-promoted hydrotrifluoromethylation have been developed.…”

“…3 Unactivated VCPs, as five-carbon synthons, were explored in a number of transition-metalcatalyzed 1,5-difunctionalization reactions, e.g., Ni-catalyzed silaboration, 4 Fe-catalyzed hydroboration, 5 Fe-catalyzed dicarbofunctionalization, 6 Rh-catalyzed nitrene-transfer, 7 Cu-catalyzed cyanotrifluoromethylation, 8 Au-catalyzed hydroamination, 9 and Ir-catalyzed bromotrichloromethylation. 10 In addition, an organocatalytic (C 6 F 5 ) 3 B-catalyzed ionic hydrosilylation 11 and a visible-light-promoted hydrotrifluoromethylation 12 have been developed. In mechanistic studies, the VCP scaffold is widely used as a radical probe, but the 1,5difunctionalized products are clearly not central to the research works.…”