thiomorpholine;hydrochloride

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thiomorpholine hydrochloride (2.10 g., 0.015 mole), triethylamine (2.1 ml., 0.015 mole), and 1-(3,5-diamino-6-chloropyrazinoyl)-2-methyl-2-thiopseudourea hydroiodide (1.94 g., 0.005 mole) are heated in tetrahydrofuran (50 ml.) at reflux for 4 hrs. The reaction mixture is added to ice-water to precipitate 590 mg. of 3,5-diamino-6-chloro-N-[(4-thiomorpholinyl)aminomethylene]-2-pyrazinecarboxamide which melts at 234°-6° C. after reprecipitation from dilute hydrochloric acid with sodium hydroxide. at reflux for 4 hrs to precipitate 590 mg of 3,5-diamino-6-chloro-N-[(4-thiomorpholinyl)aminomethylene]-2-pyrazinecarboxamide which melts at 234°-6° C. after reprecipitation from dilute hydrochloric acid with sodium hydroxide

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Oxalyl chloride (10 ml) is added dropwise to a suspension of 2-(6-methoxynaphth-2-yl)-propionic acid (17.4 g, 75.6 mmols) in benzene (200 ml). After refluxing for 2 hours, the benzene is evaporated off under reduced pressure and the residue is taken up in alcohol-free methylene chloride (100 ml). This solution is added dropwise, in the course of 30 minutes, to a cooled suspension (0° C.) of thiamorpholine hydrochloride (11.6 g, 83.16 mmols) and N-ethylmorpholine (19.12 g, 166 mmols) in methylene chloride (100 ml). After standing overnight, the reaction medium is washed successively with water, hydrochloric acid (10% strength), water, aqueous sodium bicarbonate solution (saturated) and water and then dried (Na2SO4) and evaporated. This yields a solid which is the intermediate (IV). A solution of this amide (5.60 g, 17.78 mmols) in tetrahydrofuran (50 ml) is added dropwise to a stirred solution of borane (55 mmols) in tetrahydrofuran (50 ml), which has been cooled to 0° C. The solution is then heated at the reflux temperature for 2 hours and again cooled to 0° C. Water is then added cautiously in order to destroy the excess borane, and dilute hydrochloric acid is added. After refluxing for 2 hours the benzene is evaporated off under reduced pressure the reaction medium is washed successively with water, hydrochloric acid (10% strength), water, aqueous sodium bicarbonate solution (saturated) and water dried (Na2SO4) evaporated This yields a solid which The solution is then heated at the reflux temperature for 2 hours again cooled to 0° C to destroy the excess borane, and dilute hydrochloric acid is added