The first Pd-catalyzed Mizoroki-Heck-type reaction of [Ph2SRfn][OTf] with alkenes is described. The reaction of [Ph2SRfn][OTf] (Rfn = CF3, CH2CF3) with alkenes in the presence of 10 mol% Pd[P(t-Bu)3]2 and TsOH...
A pretreatment composition of: (a) at least one compound having structure VI
V
1
—Y—V
2
VI
wherein Y is selected from the group consisting of S, O, NR
2
, (HOCH)
p
, and
each R
1
is independently selected from H, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group or a halogen, each R
2
is independently H, SH, CH
3
, C
2
H
5
, and a linear or branched C
1
-C
4
alkyl group containing a thiol group; and wherein V
1
and V
2
are independently selected from
wherein, m is independently an integer from 0 to 4 with the proviso that m can =0 only when Y═
n is an integer from 1 to 5; p is an integer of from 1 to 4, and each R
1
is defined as above;
(b) at least one organic solvent, and optionally, (c) at least one adhesion promoter; wherein the amount of the compound of Structure VI present in the composition is effective to inhibit residue from forming when the photosensitive composition is coated on a substrate and the coated substrate is processed to form an image thereon.
Pd/Cu-Catalyzed C–H/C–H Cross Coupling of (Hetero)Arenes with Azoles through Arylsulfonium Intermediates
作者:Ze-Yu Tian、Zeng-Hui Lin、Cheng-Pan Zhang
DOI:10.1021/acs.orglett.1c01322
日期:2021.6.4
A highly efficient method for the selective formal C–H/C–H cross-coupling of azoles and (hetero)arenes was established through arylsulfonium intermediates under transition-metal catalysis, which produced a variety of 2-(hetero)aryl azoles in good to excellent yields. Advantages of the reaction included mildness, a good functional group tolerance, a wide range of substrates, a high regio- and chemoselectivity
The Pd-catalyzed Suzuki–Miyaura cross-coupling of alkyl- and fluoroalkyl(diphenyl)sulfonium triflates with arylboronicacids was compared. The fluorine substitution on the alkyl groups of [Ph2SR][OTf] had a big influence on the reaction. Perfluoroalkyl(diphenyl)sulfonium triflates (2b–d) were unsuccessful participants in the Pd-catalyzed phenylation of arylboronicacid under the standard conditions because
比较了Pd催化的三氟甲基磺酸烷基酯和氟代烷基(二苯基)ulf与芳基硼酸的Suzuki-Miyaura交叉偶联。[Ph 2 SR] [OTf]烷基上的氟取代对反应有很大影响。在标准条件下,全氟烷基(二苯基)ulf三氟甲磺酸酯(2b–d)未能成功地参与Pd催化的芳基硼酸的苯基化反应,因为长链全氟烷基具有很强的负电性,而是经S R fn键断裂。多氟烷基三苯二氟es(2f–h)与芳基硼酸反应,由于de盐的去质子化和β-F消除的趋势,以非常低的收率得到苯基化产物。最终,发现(2,2,2-三氟乙基)三氟甲磺酸二苯基s(2e),三氟甲磺酸甲基或乙基(二苯基)i(2i或2j)和三氟甲磺酸三苯基s(2m)是比其他测试过的苯基硫salts盐更有效的试剂钯催化的苯基化反应,在温和条件下可提供更高的所需产物收率。
Ullmann-type <i>N</i>-arylation of anilines with alkyl(aryl)sulfonium salts
作者:Ze-Yu Tian、Cheng-Pan Zhang
DOI:10.1039/c9cc06535k
日期:——
Ullmann-type N-arylation of anilines using alkyl(aryl)sulfonium triflates as arylation reagents has been accomplished. The reaction enabled Caryl–S bond cleavage over Calkyl–S bond breakage of alkyl(aryl)sulfoniums by Pd(P(tBu)3)2/CuI and gave the corresponding N-arylated products in good to high yields. It was also significant that the reactions of aniline with asymmetric butyl(mesityl)(aryl)sulfonium triflates