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Novel guanidinylating reagents and heterocyclic structures for peptidomimetic drug design.

机译:用于拟肽药物设计的新型胍基化试剂和杂环结构。

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摘要

In our program to develop resin-bound reagents, we synthesized resin-bound N-Boc-N-triflyl guanidine. This structure was immobilized on the solid support via a urethane linker resembling the known di-urethane protected triflyl guanidines. The reagent has been shown to act as a guanidinylating reagent. Secondary amines, which are extremely difficult to guanidinylate with previously developed guanidinylating reagents, can now be readily transformed into guanidines. A series of primary and secondary amines have been subjected to the resin-bound guanidinylating reagent to form immobilized guanidines. The target molecules were formed under mild conditions, over reasonable reaction times and in modest to high yields. Utilizing the Wang linker, we were able to cleave these N-alkyl and N,N-dialkyl guanidines from the linker in a traceless manner. In addition, the development of solid-phase guanidinylating reagents yielded new guanidine and heterocyclic structures for the design and synthesis of drug candidate molecules.; Inspired by the resin-bound guanidines, we synthesized novel heterocyclic compounds incorporating the guanidine group. For this purpose an amine immobilized on a solid-support was acylated with protected amino acids. Following the deprotection, the liberated amines were guanidinylated utilizing a new reagent, N,N-bis(allyloxy-carbonyl)-N-triflyl guanidine, which has not been reported in the literature. This reagent was synthesized in multi-gram quantities from guanidine hydrochloride. The deprotected guanidines were subsequently regioselectively cyclized with β-keto esters producing heterocyclic compounds in high purities. Following the synthesis of several target structures, the synthesis of a library by combinatorial methodology was carried out utilizing different amino acids and β-keto esters which produced novel heterocycles.; An ongoing project in our laboratories involves the peptide hormone somatostatin. Non-peptidic analogs of somatostatin have been prepared previously and shown to bind selectively to somatostatin receptor subtype 2. We designed novel heterocyclic scaffolds incorporating substituents which are required for biological activity. Starting from optically active tryptophan, we prepared somatostatin analogs in a multi-step synthesis featuring an intramolecular Fukuiyama-Mitsunobu reaction. The target structures are based on substituted pyrazino[1,2- b]isoquinolin-4-one and pyrrolo[1,2-a]pyrazine-4-one scaffolds. These scaffolds contain asymmetric centers over which we have full control. The biological properties of the target molecules are currently under investigation.
机译:在开发与树脂结合的试剂的程序中,我们合成了与树脂结合的 N -Boc- N '-三氟胍。该结构通过类似于已知的二氨基甲酸酯保护的三氟胍胍的氨基甲酸酯连接基被固定在固体支持物上。该试剂已显示出可作为胍基化试剂。仲胺很难用先前开发的胍基化试剂进行胍基化,现在可以很容易地转化成胍。一系列伯胺和仲胺已经过树脂结合的胍基化试剂形成固定化的胍。目标分子是在温和条件下,合理的反应时间内并以中等至高收率形成的。利用Wang连接子,我们能够无痕地从连接子上裂解这些 N -烷基和 N,N -二烷基胍。此外,固相胍基化试剂的开发为药物候选分子的设计和合成产生了新的胍和杂环结构。受树脂结合的胍的启发,我们合成了结合了胍基的新型杂环化合物。为此目的,用保护的氨基酸将固定在固相载体上的胺酰化。脱保护后,使用新试剂 N,N '-双(烯丙氧基羰基)- N ' '-三氟胍,尚未在文献中报道。该试剂是由盐酸胍合成的,克含量为几克。随后将脱保护的胍与β-酮酯进行区域选择性环化,从而产生高纯度的杂环化合物。在合成了几种靶结构之后,利用不同的氨基酸和产生新杂环的β-酮酯通过组合方法进行了文库的合成。我们实验室中正在进行的项目涉及肽激素生长抑素。以前已经制备了生长抑素的非肽类似物,并显示出与生长抑素受体亚型2选择性结合的能力。我们设计了新的杂环支架,其中掺入了生物活性所必需的取代基。从光学活性色氨酸开始,我们以多步合成为特征,制备了生长抑素类似物,这些合成以分子内福山-光延反应为特征。目标结构基于取代的吡嗪并[1,2- b ]异喹啉-4-酮和吡咯并[1,2- a ]吡嗪-4-酮骨架。这些支架包含不对称中心,我们可以完全控制这些中心。目前正在研究靶分子的生物学特性。

著录项

  • 作者

    Zapf, Christoph W.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Chemistry Organic.; Chemistry Pharmaceutical.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 264 p.
  • 总页数 264
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;药物化学;
  • 关键词

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