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Modified Coumarins. 8. Synthesis of Substituted 5-(4-Methoxyphenyl)-7H-furo[3,2-g]chromen-7-ones

✍ Scribed by M. M. Garazd; Ya. L. Garazd; A. S. Ogorodniichuk; V. P. Khilya

Book ID: 110423097
Publisher: Springer
Year: 2002
Tongue: English
Weight: 86 KB
Volume: 38
Category: Article
ISSN: 0009-3130
DOI: 10.1023/a:1022626402415

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The \(o\)-hydroxyformylcoumarin \(5 \mathrm{~b}\), easily prepared from compound 1 , is further transformed to the title coumarin derivatives \(7,10,19 a-c\) via its initial Wittig olefination with ylides \(2 b, 8,18 a-c\) respectively. Coumarins \(16 \mathrm{a}, \mathrm{b}\) were also formed by tre