Spectroscopic studies of the thermochromism of N-(2-hydroxy-4-methoxybenzylidene)-4-nitroaniline
โ Scribed by Akira Takase; Sakumitsu Sakagami; Kazuhiro Nonaka; Toshiaki Koga
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 444 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0377-0486
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๐ SIMILAR VOLUMES
N -[4-(4-n-Alkoxybenzoyloxy)-2-hydroxybenzylidene]chloroanilines [nAHmCl (n = 1-8; m = 2, -ortho; m = 3, -meta; m = 4, -para)] were newly synthesized. Some of them exhibited a photochromic color state on ultraviolet irradiation. In 1AH2Cl, the fresh solid species as prepared by crystallization from
## Abstract 3โAcetylโ4โhydroxyโchromenโ2โone (**1**) was brominated with phenyltrimethylammonium tribromide to afford 3โ(2โbromoacetyl)โ4โhydroxyโchromenโ2โone (**2**) whose reactions with thiourea, thioacetamide and ammonium dithiocarbamate gave respectively 3โ(2โaminoโthiazolโ4โyl)โ4โhydroxyโ, 4โ