Tetrahedron Letters p. 4125 - 4128 (1994)
Update date:2022-07-29
Topics:
Tanaka, Tetsuaki
Okuda, Osamu
Murakami, Kazuo
Yoshino, Hitoshi
Mikamiyama, Hidenori
et al.
Spiro<5.5>undecane derivatives 6A and 7S were obtained in moderate stereoselectivity by the intramolecular spiroannelation reaction of a bis-acetal 3 promoted by TMSOTf, and the selectivity was reversed by changing the solvent from acetonitrile to THF.
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