摘要 |
1461313 5 - Bromo - 5 - nitro - 1,3 - dioxanes ELI LILLY & CO 12 Feb 1974 [16 Feb 1973 26 July 1973] 33196/76 Divided out of 1461312 Heading C2C Novel 2 - (ethyl or n - propyl) - 5 - bromo- 5 - nitro - 1,3 - dioxane is prepared by reacting 2 - bromo - 2 - nitro - propane - 1,3 - diol with propionaldehyde or n-butyraldehyde in an acidic medium. |