maleamic acid13 (30.0 g, 0.189 mole) was treated with H2S04 (0.9 ml) in MeOH (300 mi) at 25度 for 6 days, and, after neutralization and removal of and solvent, yielded a colorless oil, bp 130" (0.00,S mni) 113.6 g, 5l%), which crystd<BR>on standing, mp 70-71°.15 Other unsubstituted maleimides were prepd in the same way, and their properties are listed in Table I ( 4 , C, = (CHz)r, CH~CHIOCHZCH~).
Pt,是什么意思啊?后处理时,中和H2SO4,是不是就加Na2CO3的水溶液呢,但是MeOH和水是互溶的,怎么分离呢?
