Aromatic and heteroaromatic acid halides for synthesizing polyamides
申请人:Pharmacia Corporation
公开号:US20030105279A1
公开(公告)日:2003-06-05
The present invention is directed to protected amino acid halide monomers and oligomers, and to their use in the efficient sythesis of polyamides. The present invention is further directed to the use of &agr;-haloenamine reagents, which may optionally be immobilized, for the preparation of the amino acid halides.
Imidazopyridine/Pyrrole and Hydroxybenzimidazole/Pyrrole Pairs for DNA Minor Groove Recognition
作者:Dorte Renneberg、Peter B. Dervan
DOI:10.1021/ja0300158
日期:2003.5.1
The DNA binding properties of fused heterocycles imidazo[4,5-b]pyridine (Ip) and hydroxybenzimidazole (Hz) paired with pyrrole (Py) in eight-ring hairpin polyamides are reported. The recognition profile of Ip/Py and Hz/Py pairs were compared to the five-membered ring pairs Im/Py and Hp/Py on a DNA restriction fragment at four 6-base pairrecognition sites which vary at a single position 5'-TGTNTA-3'
报道了融合杂环咪唑并 [4,5-b] 吡啶 (Ip) 和羟基苯并咪唑 (Hz) 与吡咯 (Py) 在八环发夹聚酰胺中的 DNA 结合特性。将 Ip/Py 和 Hz/Py 对的识别特征与 DNA 限制片段上的五元环对 Im/Py 和 Hp/Py 在四个 6 碱基对识别位点进行比较,这些位点在单个位置 5'- TGTNTA-3',其中 N = G、C、T、A。 Ip/Py 对将 GC 与 CG、TA 和 AT 区分开来,Hz/Py 对将 TA 与 AT、GC 和 CG 区分开来,提供了一个新的一组杂环对以靶向 DNA 小沟中的四个 Watson-Crick 碱基对。
Process for the preparation of derivative of 4-amino-3-hydroxypyrrole-2-carboxylic acid
申请人:——
公开号:US20020042522A1
公开(公告)日:2002-04-11
Novel processes and intermediates are provided for the synthesis of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acids that are useful as monomers for polyamides capable of binding dsDNA. According to one preferred reaction scheme, an alkyl alkoxymethylene nitroacetate (Formula VIII) is prepared by reaction of a trialkyl orthoformate or orthoacetate with a nitroacetate ester in the presence of a carboxylic anhydride. The compound of Formula VIII is condensed with an N-substituted glycine to yield an N-substituted (2-nitro-2-alkoxycarbonyl)vinyl glycinate ester (Formula VII). Ring closure in the presence of an alkali metal alkoxide yields a 4-nitro-3-hydroxypyrrole-2-carboxylic ester (Formula V). After blocking of the 3-hydroxy group to produce a further intermediate (Formula IV), the 4-nitro group is reduced to a 4-amino group (Formula III), and the 4-amino group is then blocked by reaction with a dicarbonate diester to produce the fully blocked intermediate (Formula II). Saponification of the 2-carboxylic acid ester yields a monomer having a free 2-carboxylic ester moiety (Formula I).
cyclic polyamides containing pyrrole (Py), imidazole (Im), and hydroxypyrrole (Hp) aromatic amino acids recognize predetermined six basepair sites in the minorgroove of DNA. Two four-ring polyamide subunits linked by (R)-2,4-diaminobutyric acid [(R)H2Ngamma] residue form hairpin polyamide structures with enhanced DNA binding properties. In hairpin polyamides, substitution of Hp/Py for Py/Py pairs enhances
Process for the preparation of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acid
申请人:——
公开号:US20040014984A1
公开(公告)日:2004-01-22
Novel processes and intermediates are provided for the synthesis of derivatives of 4-amino-3-hydroxypyrrole-2-carboxylic acids that are useful as monomers for polyamides capable of binding dsDNA. According to one preferred reaction scheme, an alkyl alkoxymethylene nitroacetate (Formula VIII) is prepared by reaction of a trialkyl orthoformate or orthoacetate with a nitroacetate ester in the presence of a carboxylic anhydride. The compound of Formula VIII is condensed with an N-substituted glycine to yield an N-substituted (2-nitro-2-alkoxycarbonyl)vinyl glycinate ester (Formula VII). Ring closure in the presence of an alkali metal alkoxide yields a 4-nitro-3-hydroxypyrrole-2-carboxylic ester (Formula V). After blocking of the 3-hydroxy group to produce a further intermediate (Formula IV), the 4-nitro group is reduced to a 4-amino group (Formula III), and the 4-amino group is then blocked by reaction with a dicarbonate diester to produce the fully blocked intermediate (Formula II). Saponification of the 2-carboxylic acid ester yields a monomer having a free 2-carboxylic ester moiety (Formula I).