Nippon Kagaku Zasshi published new progress about 56503-96-9. 56503-96-9 belongs to thiazole, auxiliary class Thiazole,Amine,Naphthalene, name is 4-(Naphthalen-1-yl)thiazol-2-amine, and the molecular formula is C13H10N2S, Application In Synthesis of 56503-96-9.
Okamiya, Jiro published the artcile2-Amino-4(or 5)-arylthiazoles. II. Ultraviolet absorption spectra of α-naphthyl, biphenyl, and hydroxyaryl substituted compounds, Application In Synthesis of 56503-96-9, the publication is Nippon Kagaku Zasshi (1959), 903-6, database is CAplus.
cf. CA 55, 4486c. Ultraviolet absorption spectra of 2-amino-4(α-naphthyl)thiazole, m. 162°, 2-amino-4-(α-naphthyl)-5-methylthiazole, m. 195°, 2-amino-5-(α-naphthyl)thiazole, m. 129°, 2-amino-4-methyl-5-(α-naphthyl)thiazole, m. 163°, 2-amino-4-(α-naphthyl)-5-phenylthiazole, m. 223°, 2-amino-4-phenyl-5-(α-naphthyl)thiazole, m. 248°, 2-amino-4,5-bis(α-naphthyl)thiazole, m. 260° (decomposition), 2-amino-4-biphenylylthiazole, 2-amino-4-biphenylyl-5-phenylthiazole, m. 201°, 2-amino-4-(p-hydroxyphenyl)thiazole, m. 212°, 2-amino-4-(p-hydroxyphenyl)-5-methylthiazole-HCl, HCl, 208-10°, 2-amino-4-(o-hydroxyphenyl)thiazole, 2-amino-4-(o-hydroxyphenyl)-5-methylthiazole, m. 120°, 2-amino-4-(p-hydroxyphenyl)-5-phenylthiazole, m. 284°, 2-amino-4-(o-hydroxyphenyl)-5-phenylthiazole, m. 171°, and 2-amino-4-(2-hydroxy-1-naphthyl)thiazole, m. 198°, were reported. The naphthyl group, due to its steric hindrance, exerted less effect on spectra, but was bathochromic at 5 position when compared with that at 4 position. The o-hydroxyphenyl group gave a red shift to the maximum at shorter wave length in spite of its expected steric effects. This must be attributed to the existence of chelation. Intermediate ketones of above thiazoles were prepared α-Bromonaphthalene (27.6 g.) was converted to Grignard reagent, 1.33 g. CdCl2 added, the solvent replaced by C6H6, and 8.3 g. AcCl added to give 11 g. α-acetonaphthone. Similarly, α-propionaphthone, α-naphthyl benzyl ketone, ω-(α-naphthyl)acetophenone and ω-(α-naphthyl)acetonaphthone were prepared in 55, 60, 59 and 36% yields, resp. Naphthalene (100 g.), 250 cc. CS2, and 130 g. AlCl3 treated with ethylene oxide from 70 cc. ClCH2CH2OH gave 29 g. α-naphthylethanol which was oxidized with CrO3 in AcOH to α-naphthylacetaldehyde. EtOMgCH(CO2Et)2 prepared from 9 g. CH2(CO2Et)2, 1.3 g. Mg, and 7 cc. EtOH was treated with α-naphthylacetyl chloride prepared from 9.5 g. α-naphthylacetic acid and SOCl2, and the product hydrolyzed to give 5 g. α-naphthylacetone.
Nippon Kagaku Zasshi published new progress about 56503-96-9. 56503-96-9 belongs to thiazole, auxiliary class Thiazole,Amine,Naphthalene, name is 4-(Naphthalen-1-yl)thiazol-2-amine, and the molecular formula is C13H10N2S, Application In Synthesis of 56503-96-9.
Referemce:
https://pubchem.ncbi.nlm.nih.gov/compound/thiazole,
Thiazole | chemical compound | Britannica