Regiospecific Decarboxylative Allylation of Nitriles
摘要:
Palladium-catalyzed decarboxylative alpha-allylation of nitriles readily occurs with use of Pd-2(dba)(3) and rac-BINAP. This catalyst mixture also allows the highly regiospecific alpha-allylation of nitrites in the presence of much more acidic (x-protons. Thus, the reported method provides access to compounds that are not readily available via base-mediated allylation chemistries. Lastly, mechanistic investigations indicate that there is a competition between C- and N-allylation of an intermediate nitrile-stabilized anion and that N-allylation is followed by a rapid [3,3]-sigmatropic rearrangement.
Lebedev, S. A.; Starosel'skaya, L. F.; Petrov, E. S., Journal of Organic Chemistry USSR (English Translation), 1986, vol. 22, # 7, p. 1410
作者:Lebedev, S. A.、Starosel'skaya, L. F.、Petrov, E. S.
DOI:——
日期:——
Regiospecific Decarboxylative Allylation of Nitriles
作者:Antonio Recio、Jon A. Tunge
DOI:10.1021/ol902065p
日期:2009.12.17
Palladium-catalyzed decarboxylative alpha-allylation of nitriles readily occurs with use of Pd-2(dba)(3) and rac-BINAP. This catalyst mixture also allows the highly regiospecific alpha-allylation of nitrites in the presence of much more acidic (x-protons. Thus, the reported method provides access to compounds that are not readily available via base-mediated allylation chemistries. Lastly, mechanistic investigations indicate that there is a competition between C- and N-allylation of an intermediate nitrile-stabilized anion and that N-allylation is followed by a rapid [3,3]-sigmatropic rearrangement.