Decatungstate As Photoredox Catalyst: Benzylation of Electron-Poor Olefins
摘要:
Excited tetrabutylammonium decatungstate (TBADT), known to activate a variety of compounds via hydrogen atom transfer (HAT), has now been applied as a photoredox catalyst for the effective oxidative cleavage of benzyl silanes and radical benzylation of reducible olefins occurring in isolated yields from poor to excellent.
Lewis Basic Salt-Promoted Organosilane Coupling Reactions with Aromatic Electrophiles
作者:Tyler W. Reidl、Jeffrey S. Bandar
DOI:10.1021/jacs.1c05764
日期:2021.8.11
Lewis basic saltspromote benzyltrimethylsilane coupling with (hetero)aryl nitriles, sulfones, and chlorides as a new route to 1,1-diarylalkanes. This method combines the substrate modularity and selectivity characteristic of cross-coupling with the practicality of a base-promoted protocol. In addition, a Lewis base strategy enables a complementary scope to existing methods, employs stable and easily
<i>B</i>-Alkyl Suzuki−Miyaura Cross-Coupling Reactions with Air-Stable Potassium Alkyltrifluoroborates
作者:Gary A. Molander、Chang-Soo Yun、María Ribagorda、Betina Biolatto
DOI:10.1021/jo0343331
日期:2003.7.1
palladium-catalyzed cross-coupling reaction of substitutedpotassium alkyltrifluoroborates with arylhalides and aryl triflates proceeds readily with moderate to good yields. The potassium alkyltrifluoroborates 1, 2, and 3a-e were easily synthesized and obtained as air-stable crystalline solids that can be stored for long periods of time. All of the cross-couplings proceed under the same reaction conditions using PdCl(2)(dppf)
Palladium-catalyzed C(sp<sup>3</sup>)–C(sp<sup>2</sup>) cross-coupling of homoleptic rare-earth metal trialkyl complexes with aryl bromides: efficient synthesis of functionalized benzyltrimethylsilanes
作者:Guilong Cai、Yingda Huang、Tingting Du、Shaowen Zhang、Bo Yao、Xiaofang Li
DOI:10.1039/c6cc01312k
日期:——
The first C(sp3)-C(sp2) cross-coupling of rare-earth metal alkyl complexes with aryl bromides has been developed for an efficient synthesis of benzyltrimethylsilanes with diverse functional groups.
The electrochemical reduction of benzyl and allyl halides carried out in the presence of chlorotrimethylsilane afforded the corresponding benzylsilanes and allylsilanes in satisfactory yields.
challenges of this system. The same base trap mixture is found to metallate N–Me bonds of the diamines TMEDA and PMDETA. Comparative studies replacing LiTMP by NaTMP have found significant alkali metal effects on the extent of both base-trap cocomplexation and onward reactivities of TMT products. Stepwise metalation and trapping, so called trans-metal-trapping (TMT), of anisole is studied using LiTMP