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Hantzsch reaction of 3-(2-bromoacetyl)tropolone. Synthesis of 3-(4-thiazolyl)tropolones

✍ Scribed by Chang-Yi Qian; Zhong-Tian Jin; Bing-Zhu Yin; Kimiaki Imafuku

Book ID
112129258
Publisher
Journal of Heterocyclic Chemistry
Year
1989
Tongue
English
Weight
257 KB
Volume
26
Category
Article
ISSN
0022-152X

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Hantzsch reaction of 3-(2-bromoacetyl)-4
Hantzsch reaction of 3-(2-bromoacetyl)-4-hydroxy-chromen-2-one. Synthesis of 3-(thiazol-4-yl)-4-hydroxy coumarines
✍ S. Sukdolak; S. Solujić; N. Manojlović; N. Vuković; L. J. Krstić 📂 Article 📅 2004 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 143 KB

## Abstract 3‐Acetyl‐4‐hydroxy‐chromen‐2‐one (**1**) was brominated with phenyltrimethylammonium tribromide to afford 3‐(2‐bromoacetyl)‐4‐hydroxy‐chromen‐2‐one (**2**) whose reactions with thiourea, thioacetamide and ammonium dithiocarbamate gave respectively 3‐(2‐amino‐thiazol‐4‐yl)‐4‐hydroxy‐, 4‐