Photomediated ring contraction of saturated heterocycles.

Photomediated ring contraction of saturated heterocycles.
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DOI:
10.1126/science.abi7183
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发表时间:
2021-08-27
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Sarpong R
Sarpong R
中科院分区:
其他
文献类型:
--
作者:
Jurczyk J;Lux MC;Adpressa D;Kim SF;Lam YH;Yeung CS;Sarpong R

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饱和杂环化合物存在于许多治疗和生物活性天然产物中,并且在许多医药和农业化学化合物库中丰富。为了获得新的化学空间和功能,已经开发了许多在这些结构的外围进行功能化的方法。相对较少的方法是已知的重组其核心框架。在此,我们描述了可见光介导的α-酰化饱和杂环的环收缩。这种非常规的转化与传统的环收缩正交,挑战了杂环(包括哌啶、吗啉、噻烷、四氢吡喃和四氢异喹啉衍生物)多样化的范例。这种Norrish II型变体的成功取决于特定化学环境中光反应性酮基团之间的反应性差异。该策略被应用于药物衍生物、肽和糖的后期重塑。
Saturated heterocycles are found in numerous therapeutics and bioactive natural products and are abundant in many medicinal and agrochemical compound libraries. To access new chemical space and function, many methods for functionalization on the periphery of these structures have been developed. Comparatively fewer methods are known for restructuring their core framework. Herein, we describe a visible light–mediated ring contraction of α-acylated saturated heterocycles. This unconventional transformation is orthogonal to traditional ring contractions, challenging the paradigm for diversification of heterocycles including piperidine, morpholine, thiane, tetrahydropyran, and tetrahydroisoquinoline derivatives. The success of this Norrish type II variant rests on reactivity differences between photoreactive ketone groups in specific chemical environments. This strategy was applied to late-stage remodeling of pharmaceutical derivatives, peptides, and sugars.
DOI: 10.1016/j.bpj.2008.11.061
发表时间: 2009-03-18
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