Trimethylsilyl derivatives of N4-Boc-cytosine and their effect on I2-mediated nucleosidation of O-MTM ethers
作者:Yumei Huang、Subhakar Dey、Philip Garner
DOI:10.1016/s0040-4039(02)02850-2
日期:2003.2
Mono- and bis(trimethylsilyl) derivatives of N-4-Boc-cytosine were synthesized and characterized by H-1 NMR. Only the mono(trimethylsilyl)-N-4-Boc-cytosine participates in the iodine-mediated nucleosidation of N-Fmoc-O-methylthiomethyl serine benzyl ester to produce the cytosine nucleoamino acid, while the bis(trimethylsilyl) derivative failed to give any product. A tentative mechanistic explanation is proposed. (C) 2003 Elsevier Science Ltd. All rights reserved.
The α-Helical Peptide Nucleic Acid Concept: Merger of Peptide Secondary Structure and Codified Nucleic Acid Recognition
repeating tetrapeptidyl unit, aa(1)-aa(2)-aa(3)-Ser(B), where aa(1) through aa(3) represent generic ancillary amino acids and B = nucleobases linked to Ser via a methylene bridge. Effective syntheses of constituent Fmoc-protected nucleoamino acids (Fmoc-Ser(B)-OH, where B = thymine, cytosine, and uracil) are described along with a protocol for the solid-phase synthesis of 21mer alpha PNAs containing five such