Две статьи из J.Het.Chem.

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Journal of Heterocyclic Chemistry 1996, Volume 33, pp. 647-654,
"Furopyridines. XIX. Reaction of Furo[2,3-b]-, -[3,2-b]-, -[2,3-c]- and -[3,2-c]pyridine with Acetic Anhydride",
Shunsaku Shiotani, Katsunori Taniguchi, Toshimasa Ishida, Yasuko In
https://www.jhetchem.com/cd2html.php?file=19960647

Journal of Heterocyclic Chemistry 1998, Volume 35, pp. 1237-1247,
"Furopyridines. XXVII. Reactions of 2-Methyl and 2-Cyano Derivatives of Furo[2,3-b]-, -[3,2-b]-, -[2,3-c]- and -[3,2-c]pyridine",
Seiji Yamaguchi, Masahide Kurosaki, Keiko Orito, Hajime Yokoyama, Yoshiro Hirai, Shunsaku Shiotani
https://www.jhetchem.com/cd2html.php?file=19981237

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большое спасибо)))

[Markovich]

Если можно, скачайте пожалуйста еще две работы:

Journal of Heterocyclic Chemistry, 2005, Volume 42, pp. 727-730
A Convenient Synthesis of 2-Mercapto and 2-Chlorobenzothiazoles
Lei Zhu, Mingbao Zhang and Miao Dai
https://www.jhetchem.com/cd2html.php?file=20050727

и

Journal für praktische Chemie, 2000, Volume 342, Issue 3, рр. 249-255
Synthesis of Reactive Condensation Products of Acetylacetone and Their Transformation into Deeply Coloured Methine Dyes
Zhengjiang Zhao, Horst Hartmann
http://www3.interscience.wiley.com/cgi- ... e/71005756
DOI: 10.1002/(SICI)1521-3897(200003)342:3<249::AID-PRAC249>3.0.CO;2-8

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[Markovich]

СПАСИБО!!!