The solid-phase synthesis of a new class of nucleobase-modified peptide-mimetic oligomers is described. beta-Peptoids and P-peptoid hybrids bearing thymine on the side chain are prepared from N-Fmoc-N-[2-(thymin-l-yl)ethyl]-beta-alanine. (c) 2006 Elsevier Ltd. All rights reserved.
Selective N1-Alkylation of 1,3-Dibenzoyluracils: One-Pot Way to N1-Monosubstituted Uracil Derivatives
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%.
CRUICKSHANK, K. A.;JIRICNY, J.;REESE, C. B., TETRAHEDRON LETT., 1984, 25, N 6, 681-684