A single-step synthesis of methyl ethers of dihydro alloptaeroxylin, dihydro spathelia chromene and related dihydro pyrano coumarin derivatives

P E KUMAR; K J RAJENDRA PRASAD

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A single-step synthesis of methyl ethers of dihydro alloptaeroxylin, dihydro spathelia chromene and related dihydro pyrano coumarin derivatives

机译：一步合成二氢苏木精，二氢Spathelia chromne和相关的二氢吡喃香豆素衍生物的甲基醚

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Treatment of hydroxy-2,2-dimethyl chromans 1,4,8 with ethyl acetoacetate (EAA) in the absence of any condensing agents afforded a mixture of dihydropyrano coumarins and dihydropyrano chromones, 2 + 3, 5 + 6 and 9 + 10 respectively. Demethylation of methyl ethers of dihydro-spatheliachromene(6) and -alloptaeroxylin (10) using anhydrous A1C1_3-CH_3CN yielded the correspond chromans, 7 and 11.

机译：在没有任何缩合剂的情况下，用乙酰乙酸乙酯（EAA）处理羟基-2,2-二甲基苯并吡喃1,4,8，得到二氢吡喃香豆素和二氢吡喃色酮的混合物，分别为2 + 3、5 + 6和9 + 10 。使用无水A1C1_3-CH_3CN对二氢-间色二烯（6）和-allaperaeroxylin（10）的甲基醚进行脱甲基，得到相应的色团7和11。

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来源
《Proceedings of the Indian Academy of Sciences. Chemical Sciences》 |1997年第1期|p.21-25|共5页
作者
P E KUMAR; K J RAJENDRA PRASAD;
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作者单位

Department of Chemistry, Bharathiar University, Coimbatore 641 046, India;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类化学;
关键词
2; 2-Dimethyl-2H-pyrano-coumarins and -chiomones; ethyl acetoacetate; condensation;

机译：2;2-二甲基-2H-吡喃香豆素和-chiomones;乙酰乙酸乙酯;缩合;
入库时间 2022-08-18 00:38:38

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A single-step synthesis of methyl ethers of dihydro alloptaeroxylin, dihydro spathelia chromene and related dihydro pyrano coumarin derivatives

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