(02) K. Pati, G. P. Gomes, T. Harris, A. Hughes, H. Phan, T. Banerjee, K. Hanson, Igor V. Alabugin “Traceless Directing Groups in Radical Cascades: From Oligoalkynes to Fused Helicenes without Tethered Initiators” J. Am. Chem. Soc., 2014, 137, 1165; doi: 10.1021/ja510563d