p-Toluenesulfonic acid monohydrate → HCID 54372552, compound

Participants

Reaction Steps

0.45 g (1.2 mmol) of 2-amino-6-(3-(2,4-dimethoxy-phenyl)-3-hydroxy-1-propyl)-4,5,7,8-tetrahydro-6H-thiazolo[5,4-d]azepine are stirred in 35 ml of anhydrous toluene together with 0.47 g (2.7 mmol) of p-toluenesulphonic acid hydrate and 7 g of molecular sieve (4Å) in a bath at 40° C. After one hour, a further 5 g of molecular sieve are added and after a total of 2 hours a further 2.5 g of molecular sieve are added. After a total of 3 hours at 40° C. the mixture is filtered through a glass frit coated with Celite and the filter cake is washed out several times with chloroform. The toluene and chloroform solutions are extracted with semi-concentrated ammonia and with water, then dried and filtered and evaporated down in vacuo. The combined evaporation residues are purified by column chromatography on silica gel (toluene/ethyl acetate/methanol/conc. ammonia=4:3:1:0.5). Yield: 43 mg (10% of theory), Melting point: 95°-100° C. (ether).

Provenance & Evidence