摘要:
5,5-Dimethylimidazolidine-2,4-dithione (1) undergoes a Mannich reaction to give 5,5-dimethyl-3-(4-morpholinomethyl)imidazolidine-2,4-dithione (2), which on treatment with (2,3,4,6-tetra-O-acetyl-alpha-D-glucopyranosyl)bromide (ABG) afforded 5,5-dimethyl-3(4-morpholinomethyl)-2-(2',3',4',6'-tetra-O-acetyl-beta-D-thioglucopyranosyl)-4-thiohydantoin (3). Oxidation of 3 with KMnO4 furnished the corresponding sulfone 4. Deblocking of 3 with sodium ethoxide afforded 1. Reaction of 1 with ABG gave the N-glucoside 5. Deblocking of 5 afforded 5,5-dimethyl-3-N-(3,4,5-trihydroxy-6-hydroxy-methyltetrahydropyran-2-yl)imidazolidine-2,4-dithione (6). Oxidation of 5 yielded 5,5-dimethyl-imidazolidine-3-N- (2',3',4',6'-tetra-O-acetyl-beta-D-glucopyranosyl)-2-oxo,4-thione (7). Reaction of 1 with phenacyl chloride afforded 8, which on thiation with P4S10 gave 9. 5-Benzylidene-2-thioxoimidazolidin-4-one (10) reacted with some halo compounds and afforded 11 and 12. Treatment of 10 with 2,4-dinitro-1-chlorobenzene afforded N,N-dimethyl-2,4-dinitrobenzamide (14) and 2-benzylidene-6-nitro-2H-benzo[d]imidazo[2,1-b]thiazol-3-one (14). Refluxing 12 with semicarbazides gave 15 and 16. Boiling 12 with 4-aminoacetophenone furnished 18, which on treatment with hydrazine gave 5-benzylidene-2-[4-(1-hydrazonoethyl)phenylimino]imidazolidin-4 -one (19). Conden- sation of 18 with benzaldehyde yielded 5-benzylidene-2-[4-(3-phenylacryoyl)phenylimino]-imidazolidin-4-one (20).