Crystalline form B of 1,5-dimethyl-6-thioxo-3-(2,2,7-trifluoro-3-oxo-4-(prop-2-ynyl)-3,4-dihydro-2H-benzo[B][1,4]oxazin-6-yl)-1,3,5-triazinane-2,4-dione

摘要

The present invention relates to a novel crystalline form B of 1,5-dimethyl-6-thioxo-3-(2,2,7-trifluoro-3-oxo-4-(prop-2-ynyl)-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-1,3,5-triazinane-2,4-dione The invention also relates to a process for the production of this crystalline form and formulations for plant protection which contains the novel crystalline form of 1,5-dimethyl-6-thioxo-3-(2,2,7-trifluoro-3-oxo-4-(prop-2-ynyl)-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-1,3,5-triazinane-2,4-dione.

主权项

1. A crystalline form B of 1,5-dimethyl-6-thioxo-3-(2,2,7-trifluoro-3-oxo-4-(prop-2-ynyl)-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-1,3,5-triazinane-2,4-dione, which in an X-ray powder diffraction diagram at 25° C. and Cu-Kα radiation displays at least 3 of the following reflections, quoted as 20 values: 9.0±0.2°, 10.9±0.2°, 11.5±0.2°, 12.9±0.2°, 13.5±0.2°, 14.9±0.2°, 16.4±0.2°, 16.5±0.2°, 17.5±0.2° and 20.3±0.2°.