5-Fluorouracil → 1-[6-(t-Butoxycarbonylamino)-n-hexylcarbamoyl]-5-fluorouracil

Participants

Reaction Steps

The reaction was carried out in the same manner as in Example 7 except for using 9.06 g (69.6 mmole) of 5-fluorouracil, 6.20 g (62.7 mmole) of phosgene, 12.68 g (125.3 mmole) of triethylamine, and 11.36 g (52.5 mmole) of N-(t-butyoxycarbonyl)hexamethylenediamine synthesized in Reference example 13 in place of N-[N-(2-n-propyl-n-pentanoyl)-glycyl]hexamethylenediamine used in Example 7. The reaction mixture was treated in the same manner as in Example 7 to give 16.06 g (Yield: 91.3%) of pale yellowish crystals. 1 g of this crystals was recrystallized from 15 ml of ethyl acetate to give 0.52 g of colorless needle crystals.

Provenance & Evidence