Synthesis of some naturally occurring acetylchromenes.

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概要

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• 2,4-Dihydroxy-5-methoxyacetophenone on treatment with 3-chloro-3-methyl-1-butyne in the presence of K<SUB>2</SUB>CO<SUB>3</SUB>, KI, and DMF yielded its 4-(1,1-dimethyl-2-propynyl) ether (<B>2</B>) and the naturally occurring 6-acetyl-5-hydroxy-8-methoxy-2,2-dimethylchromene (<B>3</B>). More of the chromene (<B>3</B>) could be obtained by the thermal cyclisation of the acetophenone (<B>2</B>). Methylation of <B>3</B> yielded another natural chromene. 4-Hydroxy-3-methoxyacetophenone, on similar treatment with 3-chloro-3-methyl-1-butyne, gave directly natural 6-acetyl-8-methoxy-2,2-dimethylchromene. 2,3,4-Trihydroxy-5-(3-methyl-2-butenyl)acetophenone, on cyclodehydrogenation followed by methylation with 1 mol of dimethyl sulfate, yielded natural ripariochromene-A. Further methylation provided methylripariochromene-A.

• 公益社団法人 日本化学会の論文

著者

• Kumar Ashwani

  Department Of Applied Sciences Punjab Engineering College

• Kumar Ashwani

  Department of Chemistry, Himachal Pradesh University

• Chand Jain

  Department of Chemistry, Himachal Pradesh University

• Khazanchi Rajesh

  Department of Chemistry, Himachal Pradesh University

関連論文

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• Effective Two-Body Interactions in the s-d Shell Nuclei Using Sum Rule Equations in Transfer Reactions : Nuclear Physics
• Synthesis of some naturally occurring acetylchromenes.

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