Phenylacetaldehyde → 5-Phenylthiazole

HRID 1649561

反応式

HRID 1649561 の反応式
[C:1]1([C:7]2[S:11][CH:10]=[N:9][CH:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Br[CH:13]([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[CH:14]=O.[C:22]1([CH2:28][CH:29]=O)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1.BrBr.C=S.[C:35]([NH2:38])(=[S:37])[CH3:36].[NH2:39][C:40]([NH2:42])=[S:41].[CH2:43]([NH:45][C:46](=[S:48])[O-:47])[CH3:44]>CO>[C:1]1([C:7]2[S:11][CH:10]=[N:9][CH:8]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1.[CH3:36][C:35]1[S:37][C:13]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[CH:14][N:38]=1.[NH2:42][C:40]1[S:41][C:28]([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)=[CH:29][N:39]=1.[OH:47][C:46]1[S:48][C:44]([C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)=[CH:43][N:45]=1

参加物

13

反応物 8

HCID 998PhenylacetaldehydeHCID 24408BromineHCID 79115ThioformaldehydeHCID 5952095-PhenylthiazoleHCID 2723790ThioureaHCID 2723949ThioacetamideHCID 108889012-Bromo-2-phenylacetaldehyde2 回HCID 178465499HCID 178465499、化合物

生成物 4

HCID 5952095-PhenylthiazoleHCID 8731195-Phenyl-thiazol-2-ylamineHCID 123675102-Methyl-5-phenyl-1,3-thiazoleHCID 178517639HCID 178517639、化合物

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

In synthesis of 5-phenylthiazole derivatives, the intermediate α-bromo-α-phenylacetaldehyde is first synthesized by allowing phenylacetaldehyde to react with bromine according to the method as disclosed in Helv. Chim. Acta. Vol. 30, pp.2058 (1945). As the next step, according to the method disclosed in J. Amer. Chem. Soc. Vol. 71, pp.4007 (1949), α-bromo-α-phenylacetaldehyde is allowed to react respectively with thioformaldehyde, thioacetamide, thiourea and ethylthiocarbamate at room temperature in methanol as a reaction solvent to obtain 5-phenylthiazole (m.p. 45°-46° C.), 2-methyl-5-phenylthiazole (m.p. 74°-76° C.), 2-amino-5-phenylthiazole (m.p. 206°-208° C.) and 2-hydroxy-5-phenylthiazole (m.p. 202°-204° C.). On the other hand, according to the method as described in U.S. Pat. No. 2,603,646 (1952), phenylacetaldehyde is allowed to react with thiocyanogen to obtain α-phenyl-α-thiocyanoacetaldehyde, which is then allowed to react with ammonium dithiocarbamate in the presence of an acid catalyst such as dilute sulfuric acid to obtain 2-mercapto-5-phenylthiazole (m.p. 207°-209° C.).

出典と根拠

ORDレコード
ord-5e34c6bcd2774192bdbdede10a6416a1
出典データセット
uspto-grants-1983_11
特許番号
US04418070

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