A simple access to metallic or onium bistrifluoromethanesulfonimide salts
作者:Roman Arvai、Fabien Toulgoat、Bernard R. Langlois、Jean-Yves Sanchez、Maurice Médebielle
DOI:10.1016/j.tet.2009.04.068
日期:2009.7
trialkyl sulfonium, quaternary ammonium or phosphonium halides to deliver the corresponding triflimide derivatives. N-Benzyl triflimide can be also reacted with di- or tri-alkylamines and phosphines to get benzyl onium salts. Analogous reactions can be carried out with N-allyl triflimide. Therefore, the TFSI anion can be very easily and expediently associated with a wide range of metallic or organic
的(CF的许多盐3 SO 2)2 Ñ -阴离子,称为TFSI,是根据一个原始单罐方法制备。首先,将N-苄基三氟甲烷磺酰亚胺(N-苄基三氟酰亚胺)用乙醇处理以形成氧鎓中间体,然后将其用各种碱中和以提供金属或三烷基铵三氟酰亚胺盐。或者,将N-苄基三氟甲酰亚胺直接用三烷基sulf,季铵或phospho的卤化物处理以递送相应的三氟甲酸酯衍生物。ñ-三氟甲酰基苄基也可以与二或三烷基胺和膦反应以得到苄基鎓盐。可以用N-烯丙基三氟甲醚进行类似的反应。因此,TFSI阴离子可以非常容易且方便地与多种金属或有机阳离子缔合。这些盐可用作电池和燃料电池的电解质,离子液体或路易斯酸。
Calcium-Catalyzed Direct Amination of π-Activated Alcohols
作者:Stefan Haubenreisser、Meike Niggemann
DOI:10.1002/adsc.201000768
日期:2011.2.11
A calcium-catalyzed direct amination of π-activated alcohols with different nitrogen nucleophiles under very mild reaction conditions is presented. The high reactivity of the calcium catalyst allows for an efficient conversion of secondary and tertiary benzylic and allylic as well as tertiary propargylic alcohols. Nitrogen nucleophiles such as carbamates, tosylamides and anilines are readily alkylated
Lanthanide replacement in organic synthesis: Luche-type reduction of α,β-unsaturated ketones in the presence of calcium triflate
作者:Nina V. Forkel、David A. Henderson、Matthew J. Fuchter
DOI:10.1039/c2gc35619h
日期:——
calcium-mediated regioselective 1,2-reduction of challenging α,β-unsaturated ketones, such as 2-cyclopententone, is reported. The corresponding allylic alcohols are obtained in very good regioselectivities using Ca(OTf)2 and NaBH4. Furthermore, we have shown that our method can stereoselectively reduce aziridinyl ketones.
H
<sub>2</sub>
, B−H, and Si−H Bond Activation and Facile Protonolysis Driven by Pt‐Base Metal Cooperation
作者:Ramadoss Govindarajan、Shubham Deolka、Eugene Khaskin、Robert R. Fayzullin、Shrinwantu Pal、Serhii Vasylevskyi、Julia R. Khusnutdinova
DOI:10.1002/chem.202201639
日期:2022.8.4
Pt/Zn and Pt/Ca dimethyl complexes feature various degrees of metal-metal and metal-Me interactions and show Pt/Zn cooperative activation of H2, B−H and Si−H bonds, observed only when Zn is in close proximity to Pt, as well as facileprotonolysis by water, MeOH and C−H bond of terminal acetylene.
Modular Synthesis of Alkenyl Sulfamates and β-Ketosulfonamides via Sulfur(VI) Fluoride Exchange (SuFEx) Click Chemistry and Photomediated 1,3-Rearrangement
作者:Felipe Cesar Sousa e Silva、Katarzyna Doktor、Quentin Michaudel
DOI:10.1021/acs.orglett.1c01907
日期:2021.7.2
Herein, we report a synthesis of medicinally relevant β-ketosulfonamides via a photomediated 1,3-rearrangement of alkenyl sulfamates. This protocol tolerates a wide array of sensitive functional groups including alkenes, alkynes, and nitrogen-based heterocycles. Additionally, this work provides a general approach toward alkenyl sulfamates via a two-step Sulfur(VI) Fluoride Exchange (SuFEx) sequence capitalizing
在此,我们报告了通过光介导的氨基磺酸链烯基 1,3-重排合成药用相关的 β-酮磺酰胺。该协议允许广泛的敏感官能团,包括烯烃、炔烃和氮基杂环。此外,这项工作提供了一种通过两步硫 (VI) 氟化物交换 (SuFEx) 序列获得烯基氨基磺酸盐的通用方法,该序列利用 SO 2 F 2作为关键,有效地偶联容易获得的酮和胺,而不会大量过量的任何一种伙伴.