Polyamide based nucleic acid analogs — synthesis of δ-amino acids with nucleic acid bases bearing side chains
摘要:
Nucleoamino acids of type I - III have been synthesized, which can serve as building blocks for novel polyamide based nucleic acid analogs. Key steps in the syntheses are the alkylation of serinol I and homoserinol 18 with tert-butyl bromoacetate or tert-butyl bromopropionate under phase transfer conditions and the introduction of thymine or uracil into the amino acid side chains by way of a Mitsunobu reaction. Cytosine derivatives were prepared through uracil --> cytosine base conversion at the stage of N-delta-BOC protected amino acid tert-butyl esters. (C) 1997 Elsevier Science Ltd.
Polyamide based nucleic acid analogs — synthesis of δ-amino acids with nucleic acid bases bearing side chains
摘要:
Nucleoamino acids of type I - III have been synthesized, which can serve as building blocks for novel polyamide based nucleic acid analogs. Key steps in the syntheses are the alkylation of serinol I and homoserinol 18 with tert-butyl bromoacetate or tert-butyl bromopropionate under phase transfer conditions and the introduction of thymine or uracil into the amino acid side chains by way of a Mitsunobu reaction. Cytosine derivatives were prepared through uracil --> cytosine base conversion at the stage of N-delta-BOC protected amino acid tert-butyl esters. (C) 1997 Elsevier Science Ltd.
four N-Fmoc δ-amino acids with an ether linkage in the main chain and four different nucleobases on the sidechain, Fmoc-NH-C∗H(CH2-CH2-B)-CH2-O-CH2-COOH (B =thymine, uracil, N4-benzoylcytosine, and N2-isobutyrylguanine) are described. The δ-amino acids were prepared through 8–12 step synthesis starting from l-homoserine and could be linked together to form novel peptide nucleic acids (oxy-PNAs = OPNAs)