反式-三氟甲基四氟硫基氯(反式-CF 3 SF 4 Cl)是将CF 3 SF 4基团结合到有机化合物中的独特试剂。然而,CF 3 SF 4 Cl是由危险的试剂制备的或形成为低收率的反式和顺式异构体的混合物。在此,描述了在安全无气体试剂的条件下银促进的反式-CF 3 SF 4 Cl 选择性合成。此外,反式-CF 3 SF 4的合成应用Cl 通过 α-重氮羰基化合物的新三氟甲基四氟硫烷基化得到证明。
Abstract(N‐Trifluoromethylthio)saccharin has been applied as an electrophilic trifluoromethylthiolating reagent for a broad scope of heteroarenes, electron‐donating group (EDG)‐activated benzenes, and several electron‐rich olefins. Iron(III) and gold(III) catalysts showed complementary activity for different substrates.magnified image
The enantioselective construction of axially chiral compounds by electrophilic carbothiolation of alkynes is disclosed for the first time. This enantioselective transformation is enabled by the use of a Ts-protected bifunctional sulfide catalyst and Ms-protected ortho-alkynylaryl amines (Ts=tosyl; Ms=mesyl). Both electrophilic arylthiolating and electrophilic trifluoromethylthiolating reagents are
首次公开了通过炔的亲电碳硫基化对轴向手性化合物的对映选择性结构。通过使用Ts保护的双官能硫化物催化剂和Ms保护的邻炔基芳基胺(Ts =甲苯磺酰基; Ms =甲磺酰基),可以实现这种对映选择性转化。亲电芳基硫醇化试剂和亲电三氟甲基硫醇化试剂均适用于该反应。轴向手性乙烯基-芳基氨基硫化物的所得产物可以容易地转化为联芳基氨基硫化物,联芳基氨基亚砜,联芳基胺,乙烯基芳基胺和其他有价值的双官能化化合物。
Catalytic Electrophilic Thiocarbocyclization of Allenes
作者:Quanbin Jiang、Huimin Li、Xiaodan Zhao
DOI:10.1021/acs.orglett.1c03270
日期:2021.11.19
An efficient approach via catalytic electrophilic thiocarbocyclization of allenes to construct indene-based sulfides with excellent regioselectivities is disclosed. The reactions were carried out at low temperatures by selenide catalysis in the presence of TMSOTf. Not only electrophilic arylthio reagents but also electrophilic alkylthio reagents worked well under these conditions. Furthermore, the
[EN] PESTICIDALLY ACTIVE PYRROLE DERIVATIVES<br/>[FR] DÉRIVÉS DE PYRROLE ACTIFS SUR LE PLAN PESTICIDE
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2019068819A1
公开(公告)日:2019-04-11
Compounds of formula (I) as defined herein, to processes for preparing them, to pesticidal, in particular insecticidal, acaricidal, molluscicidal and nematicidal compositions comprising them and to methods of using them to combat and control pests such as insect, acarine, mollusc and nematode pests.
alkyl ethers has been developed, achieving the challenging tertiary C(sp3)–SCF3 coupling under redox‐neutral conditions. The synergism of organophotocatalyst 4CzIPN and BINOL‐based phosphorothiols can site‐selectively cleave tertiary sp3 C(sp3)–O etherbonds in complex molecules initiated by a polarity‐matching hydrogen‐atom‐transfer (HAT) event. The incorporation of several competing benzylic and methine
Metal-Free Direct Trifluoromethylthiolation of Aromatic Compounds Using Triptycenyl Sulfide Catalyst
作者:Ryo Kurose、Yuji Nishii、Masahiro Miura
DOI:10.1021/acs.orglett.1c00727
日期:2021.3.19
efficient synthetic method for the electrophilic trifluoromethylthiolation of aromaticcompounds. The key is to use triptycenyl sulfide (Trip-SMe) and TfOH to enhance the electrophilicity of SCF3 fragment through the formation of sulfonium intermediates. This method enables direct installation of an SCF3 group onto unactivated aromatics at room temperature, adopting a commercially available saccharin-based