The author of 《Visible-Light-Mediated Stereoselective 1,2-Iodoalkylation of Alkynes》 were Liu, Jie-Jie; Lan, Ling; Gao, Yu-Ting; Liu, Qi; Cheng, Liang; Wang, Dong; Liu, Li. And the article was published in Advanced Synthesis & Catalysis in 2019. Formula: C7H5N The author mentioned the following in the article:
A visible-light-mediated and photocatalyst/initiator-free addition to alkynes to afford iodo-substituted alkenyl derivatives I [R1 = n-Pr, Ph, 3-pyridyl, etc.; R = H, Me, n-Pr, etc.] and e.g. II were developed. An atom transfer radical addition mechanistic afforded a broad scope of valuable compounds I and e.g. II with high E/Z-selectivities, which were versatile intermediates for the synthesis of various tri- and tetra- substituted alkenes. In the part of experimental materials, we found many familiar compounds, such as 4-Ethynylpyridine(cas: 2510-22-7Formula: C7H5N)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Formula: C7H5N