Crystalline form of 3-methylsulfonylpropionitrile
The present invention relates to processes for preparing 3-methylsulfonylpropionitrile. The processes provide a good yield and a good purity of the final product and provide a controllable reaction. The present invention also relates to a crystalline form of 3-methylsulfonylpropionitrile having X-ray diffraction peaks at 13.9±0.1, 19.2±0.1, 20.0±0.1, 22.5±0.1, 23.2±0.1, 25.7±0.1, 28.1±0.1, 29.9±0.1, and 30.6±0.1 degrees 2θ, and wherein the most intense peak is the peak at 13.9±0.1 degrees 2θ.
1. A crystalline form of 3-methylsulfonylpropionitrile having X-ray diffraction peaks at 13.9±0.1, 19.2±0.1, 20.0±0.1, 22.5±0.1, 23.2±0.1, 25.7±0.1, 28.1±0.1, 29.9±0.1, and 30.6±0.1 degrees 2θ, and wherein the most intense peak is the peak at 13.9±0.1 degrees 2θ.
2. The crystalline form according to claim 1 , wherein 3-methylsulfonylpropionitrile is at least 95% pure.
3. The crystalline form according to claim 2 , wherein 3-methylsulfonylpropionitrile is at least 98% pure.
4. A crystalline form of 3-methylsulfonylpropionitrile having X-ray diffraction spectrum as shown in FIG. 2A .
5. The crystalline form according to claim 4 , wherein 3-methylsulfonylpropionitrile is at least 95% pure.
6. The crystalline form according to claim 5 , wherein 3-methylsulfonylpropionitrile is at least 98% pure.
7. A crystalline form of 3-methylsulfonylpropionitrile having X-ray diffraction spectrum as shown in FIG. 2D .
8. The crystalline form according to claim 7 , wherein 3-methylsulfonylpropionitrile is at least 95% pure.
9. The crystalline form according to claim 8 , wherein 3-methylsulfonylpropionitrile is at least 98% pure.