24824-36-0Relevant articles and documents
Fe(II)-Catalyzed alkenylation of benzylic C-H bonds with diazo compounds
Shi, Jiang-Ling,Luo, Qinyu,Yu, Weizhi,Wang, Bo,Shi, Zhang-Jie,Wang, Jianbo
supporting information, p. 4047 - 4050 (2019/04/10)
We report herein an alkenylation of benzylic C(sp3)-H bonds with diazo compounds via carbon cation intermediates with DDQ as the oxidant in the presence of a catalytic amount of Fe(ii). Diphenylmethane, toluene, benzyl methyl sulfide and their derivatives could be applied as substrates to afford the tetra-substituted olefin products, which may serve as useful building blocks in organic synthesis.
(Hexaphenyltrimethylene)methane dication and related carbocations
Head, Nicholas J.,Olah, George A.,Prakash, G. K. Surya
, p. 11205 - 11210 (2007/10/03)
By ionization of the respective alkenediol (8a), the (hexaphenyltrimethylene)methane dication (2) has been prepared and found stable in solution under superacidic stable ion conditions (FSO3H/SO2CIF) up to at least -20 °C. The spectroscopic data and AMI theoretical modeling indicate that although the entire π-system is twisted, phenyl groups stabilize the positive charges in 2 to a similar degree as those in the trityl cation. The hexa-p-CF3 derivative of 2 was also observable but only at very low temperatures (-90 °C). Disruption of the 3-fold symmetry and reduction of the number of stabilizing phenyl rings even to five resulted in intramolecular allylation and subsequent formation of the corresponding indenyl cations. In all the cases studied no evidence for "Y-aromatic" stabilization was found.