An Expedient Entry to Chromane Derivatives via Indium-Mediated Intramolecular Allenylation Reactions - Kang, Han-Young; Kim, Yong-Tae; Yu, Yeon-Kwon; Cha, Joo Hwan; Cho, Yong Seo; Koh, Hun Yeong (Synlett, 2004)