Lewis Acid Catalyzed Tandem Polycyclization of Internal Alkynols and Vinyl Azides Hai Xiao Siyang Xiao Yue Ji Xu Rui Wu Xin Yan Wu Pei Nian Liu 10.1021/acs.orglett.5b02556.s002 https://acs.figshare.com/articles/dataset/Lewis_Acid_Catalyzed_Tandem_Polycyclization_of_Internal_Alkynols_and_Vinyl_Azides/2112244 A novel Lewis acid catalyzed tandem cyclization reaction of internal alkynols and vinyl azides has been achieved to afford a series of products containing a pyran-based indeno­[1,2-<i>c</i>]­isochromene scaffold in moderate to high yields. This tandem polycyclization protocol provides a straightforward entry to construct the complex polycyclic skeleton through cycloisomerization, formal [4 + 2] cycloaddition, and an elimination process. 2015-11-06 00:00:00 series polycyclic skeleton cycloaddition tandem polycyclization protocol scaffold Catalyzed Tandem Polycyclization tandem cyclization reaction alkynol vinyl azides Internal Alkynols Vinyl AzidesA novel Lewis acid yield cycloisomerization elimination process entry indeno