On-DNA Hydroalkylation to Introduce Diverse Bicyclo[1.1.1]pentanes and Abundant Alkyls via Halogen Atom Transfer.

On-DNA Hydroalkylation to Introduce Diverse Bicyclo[1.1.1]pentanes and Abundant Alkyls via Halogen Atom Transfer.
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DOI:
10.1021/jacs.2c03025
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发表时间:
2022-07-13
影响因子:
15
通讯作者:
Molander, Gary A.
Molander, Gary A.
中科院分区:
化学1区
文献类型:
--
作者:
Yen-Pon, Expedite;Li, Longbo;Levitre, Guillaume;Majhi, Jadab;McClain, Edward J.;Voight, Eric A.;Crane, Erika A.;Molander, Gary A.

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dna编码文库已经证明了其在药物开发新先导化合物鉴定中的巨大价值。为了进入新的化学空间,许多方法已经出现,将传统的分子尺度反应性转移到纳米尺度上的dna化学。然而,访问含有较大比例C(sp3)内容的库的程序仍然有限,并且更容易地在dna上“逃离平原”的需求仍然存在。在此,我们报告了一个Giese添加,以三环[1.1.1.01,3]戊烷(TCP)作为自由基关键,以及其他不同的烷基,从相应的有机卤化物的dna上安装高功能化的双环[1.1.1]戊烷(bcp),作为非稳定的自由基前体。伸缩程序允许将底物池扩展至少一个数量级到无处不在的醇和羧酸,允许我们“升级”这些丰富的原料,为小分子产品提供具有不同物理化学性质的非传统文库(即含酸的非肽文库)。这种方法适用于文库生产,因为DNA损伤评估显示了良好的PCR扩增性,全长DNA标签只有6%的突变序列。
DNA-encoded libraries have proven their tremendous value in the identification of new lead compounds for drug discovery. To access libraries in new chemical space, many methods have emerged to transpose traditional mol-scale reactivity to nmol-scale, on-DNA chemistry. However, procedures to access libraries with a greater fraction of C(sp3) content are still limited, and the need to “escape from flatland” more readily on-DNA remains. Herein, we report a Giese addition to install highly functionalized bicyclo[1.1.1]pentanes (BCPs) using tricyclo[1.1.1.01,3]pentane (TCP) as a radical linchpin, as well as other diverse alkyl groups, on-DNA from the corresponding organohalides as non-stabilized radical precursors. Telescoped procedures allow extension of the substrate pool by at least an order of magnitude to ubiquitous alcohols and carboxylic acids, allowing us to “upcycle” these abundant feedstocks to afford non-traditional libraries with different physicochemical properties for the small-molecule products (i.e., non-peptide libraries with acids). This approach is amenable to library production, as a DNA damage assessment revealed good PCR amplifiability and only 6% mutated sequences for a full-length DNA tag.
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