Synthesis
The procedure of Example 1 was repeated with the following adjustments: the catalyst was replaced with a vanadium (18 μmol) loaded V/Mont catalyst on montmorillonite; the dosage of adamantane was adjusted to 3 mM; tert-butyl acetate was chosen as the solvent; and the reaction conditions were set to continue at 100 °C for 96 h. The V/Mont catalysts were prepared according to the method described in Japanese Patent Application Publication (kokai) No. 2004-2234. ) No. 2004-2234. The specific operation includes: adding aqueous vanadium(III) chloride solution to montmorillonite (trade name: Kunipia F, produced by Kunimine Industries Co., Ltd.), followed by ion exchange, filtration, washing, drying and roasting at 800°C in air, to finally produce the desired catalysts.
References
[1] Journal of the American Chemical Society, 1989, vol. 111, # 17, p. 6749 - 6757
[2] Journal of the American Chemical Society, 2005, vol. 127, # 44, p. 15391 - 15393
[3] Tetrahedron Letters, 1999, vol. 40, # 11, p. 2165 - 2168
[4] Tetrahedron Letters, 1999, vol. 40, # 11, p. 2165 - 2168
[5] Patent: US2006/235245, 2006, A1. Location in patent: Page/Page column 6-7
