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Ojida, Akio; Abe, Akira; Kanematsu, Ken, Heterocycles, 1994, vol. 38, # 12, p. 2585 - 2588
作者:Ojida, Akio、Abe, Akira、Kanematsu, Ken
DOI:——
日期:——
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Furannulation strategy for synthesis of the naturally occurring fused 3-methylfurans: efficient synthesis of evodone and menthofuran and regioselective synthesis of maturone via a Lewis acid catalyzed Diels-Alder reactions. Some comments for its mechanistic aspects
作者:Mariko Aso、Akio Ojida、Guang Yang、Ok Ja Cha、Eiji Osawa、Ken Kanematsu
DOI:10.1021/jo00067a031
日期:1993.7
Fused 3-methylfurans are readily obtained by the reaction of allenic sulfonium salt 1 and the enolate anions of cyclic 1,3-dicarbonyl compounds in two steps. Using these fused 3-methylfuran compounds as intermediates, furanoterpenoids such as menthofuran (8) and evodone (4b) are synthesized efficiently. Moreover, maturone (15) is also obtained regioselectivity by Lewis acid CatalYzed Diels-Alder reaction of benzofuranquinone (12) with piperylene. In the context with the regioselectivity observed in the Diels-Alder reaction of 12, semiempirical molecular orbital calculations are applied to gain its theoretical interpretation based upon frontier molecular orbital theory and transition state analysis.
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Aso, Mariko; Sakamoto, Mizue; Urakawa, Narumi, Heterocycles, 1990, vol. 31, # 6, p. 1003 - 1006
作者:Aso, Mariko、Sakamoto, Mizue、Urakawa, Narumi、Kanematsu, Ken
DOI:——
日期:——
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Sha, Chin-Kang; Santhosh; Tseng, Chen-Tso, Chemical Communications, 1998, # 3, p. 397 - 398
作者:Sha, Chin-Kang、Santhosh、Tseng, Chen-Tso、Lin, Chien-Ting
DOI:——
日期:——
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Aso, Mariko; Ojida, Akio; Yang, Guang, Heterocycles, 1993, vol. 35, # 1, p. 33 - 36
作者:Aso, Mariko、Ojida, Akio、Yang, Guang、Kanematsu, Ken
DOI:——
日期:——