Reagent-controlled regiodivergent ring expansions of steroids.

Reagent-controlled regiodivergent ring expansions of steroids.
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DOI:
10.1038/s41467-018-03248-2
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发表时间:
2018-03-05
影响因子:
16.6
通讯作者:
Aubé J
Aubé J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Charaschanya M;Aubé J

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扩环提供了一种将杂原子取代基引入碳环骨架的有效方法。然而,这类反应往往受到特定底物的倾向的限制,即只提供两种重排产物中的一种,或者根本无法实现高选择性。当寻求将天然产品的后期功能化作为药物发现的起点时,这些限制尤其严重。在这项工作中,我们提出了一种立体电子控制的环扩展序列,以选择性和灵活地访问来自普通甾体底物的互补环系统。反应中间体的化学多样化提供了100多个具有空间和功能多样性的异构性纯类似物。这种区域发散重排,以及使用手性试剂影响手性天然产物中的区域控制的概念,应该广泛适用于晚期天然产品多样化计划。天然产物的后期多样化是药物发现的重要起点。在这里,作者使用手性试剂对甾体前体进行区域控制的扩环,获得了100多个具有空间和功能多样性的异构性纯类似物。
Ring expansion provides a powerful way of introducing a heteroatom substituent into a carbocyclic framework. However, such reactions are often limited by the tendency of a given substrate to afford only one of the two rearrangement products or fail to achieve high selectivity at all. These limitations are particularly acute when seeking to carry out late-stage functionalization of natural products as starting points in drug discovery. In this work, we present a stereoelectronically controlled ring expansion sequence towards selective and flexible access to complementary ring systems derived from common steroidal substrates. Chemical diversification of the reaction intermediate affords over 100 isomerically pure analogs with spatial and functional diversity. This regiodivergent rearrangement, and the concept of using chiral reagents to affect regiocontrol in chiral natural products, should be broadly applicable to late-stage natural product diversification programs. Late-stage diversification of natural products is an important starting point for drug discovery. Here, the authors use chiral reagents to perform the regiocontrolled ring expansion of steroid precursors and achieve more than 100 isomerically pure analogs with spatial and functional diversity.
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发表时间: 2017-10-26
期刊: Chemistry (Weinheim an der Bergstrasse, Germany)
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