I have tried various ways (doc.org; scifinder, Firefox, etc.)to find the supplementary information promised in the text by:
"Supplementary data associated with this article can be found, in the online version, at https://doi.org/10.1016/j.tetlet.2018.03.051" Please tell me how to find it; or better, send the information directly to me (by email).
Dr. William F. Berkowitz
Prof. Emeritus
Graduate Center and Queens College
City University of New York