Synthesis of Parvisoflavones A and B

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概要

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• Parvisoflavone B (2', 4', 5-trihydroxy-2", 2"-dimethylpyrano[5", 6"-g]isoflavone) (2) was synthesized by regioselective reduction of 7-[2,4-bis(benzyloxy)phenyl]-2,3-dihydro-5-methoxy-2,2-dimethyl-4H, 6H-benzo[1,2-b : 5,4-b']dipyrano-4,6-dione (7) with sodium borohydride and dehydration of the resultant alcohol, followed by dealkylation with boron trichloride. Its angular isomer, parvisoflavone A (2', 4', 5-trihydroxy-2", 2"-dimethylpyrano[6", 5"-h]isoflavone) (1) was also synthesized from 3-[2,4-bis(benzyloxy)phenyl]-8,9-dihydro-5-methoxy-8,8-dimethyl-4H, 10H-benzo[1,2,-b : 3,4-b']-dipyran-4,10-dione (15) in a similar manner.

• 1991-07-25

著者

• 津嘉山 正夫

  徳島大学工学部

• 河村 保彦

  徳島大学大学院ソシオテクノサイエンス研究部

• 堀江 徳愛

  Department of Applied Chemistry, Faculty of Engineering, Tokushima University

• 津嘉山 正夫

  Department of Applied Chemistry, Faculty of Engineering, Tokushima University

• 河村 保彦

  Department of Applied Chemistry, Faculty of Engineering, Tokushima University

• 津嘉山 正夫

  Department Of Chemical Science And Technology Faculty Of Engineering The University Of Tokushima

• 玉置 寛人

  Department Of Chemical Science And Technology Faculty Of Engineering The University Of Tokushima

• 堀江 徳愛

  Department Of Applied Chemistry Faculty Of Engineering Tokushima University

• 堀江 徳愛

  Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima

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