Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... Various 2H-2,2-dimethyl-1,5-benzodioxepins have been synthesized en route to the oxindole moiety of paraherquamide (1). The key step is the 7-membered ring formation from prenylated catechols using either PhSeCl, N-PSP or m-CPBA/SnCl 4 . ... Various 2H-2,2-dimethyl-1, ...