A new synthesis of n-blocked dihydrouracil and dihydroorotic acid derivatives using lithium tri-sec-butyl borohydride as reducing agent
作者:Stephen J. Hannon、Nitya G. Kundu、Robert P. Hertzberg、Ram S. Bhatt、Charles Heidelberger
DOI:10.1016/s0040-4039(01)83925-3
日期:——
1,3-Di-N-substituted uracil and its derivatives have been reduced with lithium-tri-sec-butyl borohydride to the corresponding 5,6-dihydro compounds in excellent yields. Alkylation of 5-position of uracil is also very conveniently accomplished.
Some N-alkyl derivatives of 5-fluorouracil were designed to act as latent depot forms of 5-fluorouracil. A general and efficient method for the syntheses of the alkylated derivatives is described. As expected, the alkylated derivatives of 5-fluorouracil did not show any cytotoxicity in cell culture systems even up to 10(-4) M concentration. The synthesis of 1,3-dimethyl-5-fluoro-5,6-dihydrouracil is