Oxygen Nucleophile Initiated Tandem Conjugate Addition Reactions of 1-Nitro-1-cyclohexene with 4-Hydroxy-2-butynoates: Synthesis of Octahydrobenzo[b]furans - Yakura, Takayuki; Tsuda, Tomoko; Matsumura, Yukiko; Yamada, Seiji; Ikeda, Masazumi (Synlett, 1996)