1. Novikov, M. S. Tetrahedron 2013, 69, 3363. (b) Huang, C.-Y.
2. Doyle, A. G. Chem. Rev. 2014, 114, 8153. (c) Khlebnikov, A. F.
3. Springer, 2016, Vol. 41, p. 143. (d) Zhou, H.
4. Xu, H.-D. Synlett 2016, 2171. (e) Zhao, M.-N.
5. Guan, Z.-H. Org. Lett. 2018, 20, 1287.