Br[CH2:2][C:3]1[O:4][CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1.C1N2CN3CN(C2)CN1C3.Cl.[OH2:23]>>[F:9][C:8]([F:11])([F:10])[C:6]1[CH:7]=[C:3]([CH:2]=[O:23])[O:4][CH:5]=12.95 g of the product of Stage E, 9 ml of water and 3.6 g of hexamethylenetetramine were refluxed for 1 hour. 9 ml of concentrated hydrochloric acid were added. Reflux was maintained for an additional 1 hour and the mixture was allowed to return to room temperature, diluted with water and extracted with methylene chloride. The extract was washed with water and dried and the solvent was evaporated to obtain 1.9 g of the expected product.
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