Selective N1-Alkylation of 1,3-Dibenzoyluracils: One-Pot Way to N1-Monosubstituted Uracil Derivatives
作者:Alexander Ozerov、Mikhail Novikov、Anastasiya Khandazhinskaya、Pavel Solyev
DOI:10.3987/com-17-13696
日期:——
A new method for synthesis of N(-)(1)monosubstituted uracils and 5- and 6-methyluracil derivatives was developed. It consists in the selective N-1-deprotection of N-1,N-3-dibenzoyluracils in anhydrous dimethylformamide in the presence of potassium carbonate at room temperature and subsequent N-1-alkylation by allyl, benzyl or phenacyl type halides or by primary alcohols toluenesulfonates conducted one pot without isolation of the intermediates. Final N-3-debenzoylation by aqueous-alcoholic solution of ammonia affords the corresponding N-1-monosubstituted uracil derivatives with overall yields of 52-84%.