A straightforwardsynthesis of 1,2‐dicyanoalkanes by reacting nitroalkenes with trimethylsilyl cyanide in the presence of tetrabutylammoniumfluoride is described. The reaction proceeds through a tandem double Michael addition under mild conditions. Employing the hypervalent silicate generated from trimethylsilyl cyanide and tetrabutylammoniumfluoride is essential for achieving this transformation
Ring Opening of Donor–Acceptor Cyclopropanes with Cyanide Ion and Its Surrogates
作者:Maksim A. Boichenko、Ivan A. Andreev、Alexey O. Chagarovskiy、Irina I. Levina、Sergey S. Zhokhov、Igor V. Trushkov、Olga A. Ivanova
DOI:10.1021/acs.joc.9b03098
日期:2020.1.17
A straightforward method for ringopening of donor-acceptorcyclopropanes with trimethylsilyl cyanide as a surrogate of cyanide ion in the presence of B(C6F5)3 or trifluoromethanesulfonic acid as a catalyst has been developed. The methodology provides a short route to γ-cyanoesters that can be useful synthetic intermediates for the synthesis of diverse bioactive molecules such as glutaric and δ-aminovaleric
A photochemicallyinduced selective and divergent cyanation reaction of alkynes, enabled by phosphorus radicals, is described. With the use of simple triarylphosphine as a co-catalyst, three cyanation reactions, including di-hydrocyanation, anti-Markovnikov hydrocyanation, and domino hydrocyanation/reduction, can be divergently achieved, furnishing a wide array of alkyl dinitriles, alkenyl nitriles