中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | methyl (S)-4-oxo-2-phthalimidobutanoate | 182261-52-5 | C13H11NO5 | 261.234 |
—— | 4-bromo-2-phthalimidobutyric acid | 109541-71-1 | C12H10BrNO4 | 312.12 |
—— | D,L-4-(4-acetylphenoxy)-2-phthalimidobutyric acid | 65623-79-2 | C20H17NO6 | 367.358 |
—— | N-phthaloyl-S-phenyl-DL-homocysteine | 137278-28-5 | C18H15NO4S | 341.387 |
The ring opening of γ-butyrolactone with 1 mole of potassium phthalimide and the hydrolysis of the intermediate product gave 4-aminobutyric acid with an excellent yield. The condensation of 1 mole of potassium phthalimide with 2-bromo-4-butyrolactone gave a 2-phthalimidolactone which can also be opened by treatment with a second molecule of potassium phthalimide. This diphthalimido acid when hydrolyzed gave, with an excellent yield, 2,4-diaminobutyric acid dihydrochloride.