title: [Synthesis of 5-fluorouracil derivatives containing alkanoic acid].
abstract: OBJECTIVE
  To synthesize 5-fluorouracil derivatives containing 2-5 carbon alkanoic acid.
  
  
  METHODS
  N1-substituted derivatives containing alkanoic acid were prepared through the hydrolysis of these products of the reaction of haloesters and excessive amount of 5-fluorouracil. 5-fluorouracil were protected with tertbutoxycarbonyl (Boc) at N1-position, then reacted with haloesters and deprotected in turn, through this "one-pot" method, N3-substituted 5-FU alkanoic acid esters can be obtained, with high yields (75%-85%). The hydrolysis of these products gave N3-substituted 5-FU alkanoic acid at last.
  
  
  RESULTS
  Including 10 new compounds and 8 aim compounds, 16 derivatives of 5-fluorouracil were obtained and confirmed by the spectral detection.
  
  
  CONCLUSIONS
  The reaction of excessive amount of 5-fluorouracil and haloesters can produce a good yield of N1-substituted derivatives. N3-substituted derivatives can be obtained through the reactions of 5-fluorouracil protected with Boc at N1-position and haloesters.
authors.affiliation: Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
authors.forename: Liu-hua
authors.initials: LH
authors.lastname: Xu
authors.forename: Ling-ling
authors.initials: LL
authors.lastname: Weng
authors.forename: Hu
authors.initials: H
authors.lastname: Zheng
mesh_terms: D000473:Alkanes / Q000032:analysis / Q000737:chemistry; D000964:Antimetabolites, Antineoplastic / Q000138:chemical synthesis* / Q000737:chemistry; D005472:Fluorouracil / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000473:Alkanes; D000964:Antimetabolites, Antineoplastic; D005472:Fluorouracil