M. Hocek et al., SYNTHESIS OF ACYCLIC NUCLEOTIDE ANALOGS DERIVED FROM N-SUBSTITUTED 6-(1-AMINOETHYL)PURINES VIA 6-ACETYLPURINE DERIVATIVES, Tetrahedron, 53(6), 1997, pp. 2291-2302
The Stille coupling of 2-propoxy)phosphonylmethoxy]ethyl}-6-chloropuri
nes with 1-(ethoxyvinyl)tributyltin afforded 6-(1-ethoxyvinyl)purine d
erivatives. Their acid hydrolysis gave 6-acetylpurine derivatives that
after reductive amination using various primary and secondary amine h
ydrochlorides and sodium cyanoborohydride followed by deprotection aff
orded the title N-substituted 6-(1-aminoethyl)-9-(2-phosphonomethoxyet
hyl)purine derivatives. (C) 1997, Elsevier Science Ltd.