The difunctionalization of terminal alkynes was achieved with silver fluoride (AgF) and N-bromosuccinimide (NBS) as halogen sources. The presence of the halide moiety greatly enhances the reactivity of the vinyl fluoride compounds that can probably can be transformed into various products that are difficult or even impossible to obtain via direct fluorination. Meanwhile, the monofluoro<.>alkenes were
Contra-Thermodynamic, Photocatalytic <i>E</i>
→<i>Z</i>
Isomerization of Styrenyl Boron Species: Vectors to Facilitate Exploration of Two-Dimensional Chemical Space
作者:John J. Molloy、Jan B. Metternich、Constantin G. Daniliuc、Allan J. B. Watson、Ryan Gilmour
DOI:10.1002/anie.201800286
日期:2018.3.12
Designing strategies to access stereodefined olefinic organoboron species is an important synthetic challenge. Despite significant advances, there is a striking paucity of routes to Z‐α‐substituted styrenyl organoborons. Herein, this strategic imbalance is redressed by exploiting the polarity of the C(sp2)−B bond to activate the neighboring π system, thus enabling a mild, traceless photocatalytic isomerization
Synthesis of fluorinated enynes and dienes via 1-bromo 2-fluoro alkenes
作者:Said Eddarir、Hélène Mestdagh、Christian Rolando
DOI:10.1016/s0040-4039(00)71220-2
日期:1991.1
A stereospecific synthesis of fluorinated enynes and dienes was performed through palladium-catalyzed condensation of 1-bromo-2-fluoroalkenes, synthesized either through “BrF” addition to the corresponding alkynes or through bromineaddition and HBr elimination on fluoroesters, with monosubstitued alkynes or alkenes.
A general preparation of (Z)-1-fluorostilbene derivatives for the design of conformationally restricted peptidomimetics
作者:David R. Williams、Micheal W. Fultz、Thomas E. Christos、Jeffery S. Carter
DOI:10.1016/j.tetlet.2009.10.099
日期:2010.1
The preparation of (Z)-1-fluoro-2-bromostyrenes provides a general route for the formation of (Z)-1-fluorostilbene derivatives as configurationally stable spacial linkers for the design of conformationally restricted peptidomimetics. Palladium-catalyzed aryl Suzuki and Stille cross-coupling reactions have been surveyed to proceed with complete retention of fluoroalkene geometry, and permit the direct incorporation of a variety of aryl and heteroaromatic substituents. (C) 2009 Elsevier Ltd. All rights reserved.
Eddarir, Said; Francesch, Charlette; Mestdagh, Helene, Bulletin de la Societe Chimique de France, 1997, vol. 134, # 8-9, p. 741 - 756
作者:Eddarir, Said、Francesch, Charlette、Mestdagh, Helene、Rolando, Christian