Multiple Enone-Directed Reactivity Modes Lead to the Selective Photochemical Fluorination of Polycyclic Terpenoid Derivatives.
Multiple Enone-Directed Reactivity Modes Lead to the Selective Photochemical Fluorination of Polycyclic Terpenoid Derivatives.
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多种烯酮定向反应模式导致多环萜类衍生物的选择性光化学氟化。
DOI:
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发表时间:
2017
影响因子:
15
通讯作者:
T. Lectka
中科院分区:
文献类型:
--
作者:
C. Pitts;D. Bume;S. A. Harry;M. Siegler;T. Lectka
In the realm of aliphatic fluorination, the problem of reactivity has been very successfully addressed in recent years. In contrast, the associated problem of selectivity, that is, directing fluorination to specific sites in complex molecules, remains a great, fundamental challenge. In this report, we show that the enone functional group, upon photoexcitation, provides a solution. Based solely on orientation of the oxygen atom, site-selective photochemical fluorination is achieved on steroids and bioactive polycycles with up to 65 different sp3 C-H bonds. We have also found that γ-, β-, homoallylic, and allylic fluorination are all possible and predictable through the theoretical modes reported herein. Lastly, we present a preliminary mechanistic hypothesis characterized by intramolecular hydrogen atom transfer, radical fluorination, and ultimate restoration of the enone. In all, these results provide a leap forward in the design of selective fluorination of complex substrates that should be relevant to drug discovery, where fluorine plays a prominent role.
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影响因子:
15
作者:
Zhu RY;Tanaka K;Li GC;He J;Fu HY;Li SH;Yu JQ
通讯作者:
Yu JQ
DOI:
10.1039/c4qo00057a
发表时间:
2014-07-01
期刊:
Organic chemistry frontiers : an international journal of organic chemistry
影响因子:
--
作者:
Xia JB;Ma Y;Chen C
通讯作者:
Chen C
影响因子:
15
作者:
Xia JB;Zhu C;Chen C
通讯作者:
Chen C
DOI:
10.1039/c4cc05650g
发表时间:
2014-10-11
期刊:
Chemical communications (Cambridge, England)
影响因子:
--
作者:
Xia JB;Zhu C;Chen C
通讯作者:
Chen C
影响因子:
16.6
作者:
Michaudel, Quentin;Journot, Guillaume;Regueiro-Ren, Alicia;Goswami, Animesh;Guo, Zhiwei;Tully, Thomas P.;Zou, Lufeng;Ramabhadran, Raghunath O.;Houk, Kendall N.;Baran, Phil S.
通讯作者:
Baran, Phil S.