SEARCH Articles Figures Tables 2-Substituted alkyl 3- 5-Hexenyl radical cyclizations 5-hexenyl Alkyl radical cyclization Alkyl radicals Alkyl radicals substituted Alkyl substitute Cyclization substituted radicals Cyclizations alkylation Radical alkylation Radical cyclization Radicals 3-substituted Radicals hexenyl Radicals hexenyl, cyclization Substitution alkylation Substitution radical