| 摘要 |
NEW MATERIAL:A compound shown by the formula I (R1 and R2 are H, or lower alkyl). EXAMPLE:alpha-Methylthiazolidin-2-acetic acid hydrochloride. USE:An intermediate for synthesizing a penam ring-containing compound. PREPARATION:A compound shown by the formula II is reacted with cysteamine shown by the formula III in an inert solvent while stirring to give a compound shown by the formula IV, which is hydrolyzed with conc. hydrochloric acid, etc., to give a compound shown by the formula I where R1 and R2 are both H. |
