C([C:6]1[C:7](=[O:18])[NH:8][C:9]2[CH2:10][CH2:11][CH:12]([CH3:17])[CH2:13][C:14]=2[C:15]=1[OH:16])(OCC)=O.Cl>CC(O)=O>[OH:16][C:15]1[C:14]2[CH2:13][CH:12]([CH3:17])[CH2:11][CH2:10][C:9]=2[NH:8][C:7](=[O:18])[CH:6]=1Refluxing a suspension of 3-carboethoxy-4-hydroxy-6-methyl-5,6,7,8-tetrahydrocarbostyril (20 g; 0.08 mole) with 2N hydrochloric acid (300 ml) over 48 hrs. afforded the decarboethoxylated product isolated as in Example 1 m.p. (AcOH) >365° C.
Loading…