Latent nucleophiles are compounds that are themselves not nucleophilic but can produce a strong nucleophile when activated. Such nucleophiles can expand the scope of Lewis base catalyzed reactions. As a proof of concept, we report that N‐silyl pyrroles, indoles, and carbazoles serve as latent N‐centered nucleophiles in substitution reactions of allylic fluorides catalyzed by Lewis bases. The reactions
Synthesis of Indole and Biindolyl Triflones: Trifluoromethanesulfonylation of Indoles with Tf<sub>2</sub>O/TTBP (2,4,6-tri-<i>tert</i>-butylpyridine) System
A convenient synthesis of indole triflones is reported. N-Alkyl, aryl and N-H indole triflones were obtained in 82–96% yields by the Tf2O/TTBP System. Biindolyl triflones were accessed in 51–81% yields for the first time by simple treatment of the resulting indole triflones with a base and without any use of organometallic chemistry. An environmentally friendly solvent, Solkane 365/227, can be substituted
据报道,吲哚三烯酮的方便合成。通过Tf 2 O / TTBP系统获得N-烷基,芳基和N- H吲哚三氟酮,产率为82-96%。通过简单地用碱处理所得的吲哚三氟甲磺酸,而不使用任何有机金属化学方法,首次以51-81%的产率获得了Biindolyl三氟甲磺酸。可以使用环保溶剂Solkane 365/227代替该工艺,而不会降低效率。
Asymmetric Synthesis of Indole Homo-Michael Adducts via Dynamic Kinetic Friedel–Crafts Alkylation with Cyclopropanes
作者:Steven M. Wales、Morgan M. Walker、Jeffrey S. Johnson
DOI:10.1021/ol4010646
日期:2013.5.17
An enantioconvergent Friedel-Crafts alkylation of indoles with donor-acceptor cyclopropanes is described. The reaction is catalyzed by pybox center dot Mgl(2) and proceeds via a type I dynamic kinetic asymmetric transformation (DyKAT).
Dhanak, Dashyant; Reese, Colin B., Journal of the Chemical Society. Perkin transactions I, 1986, p. 2181 - 2186
作者:Dhanak, Dashyant、Reese, Colin B.
DOI:——
日期:——
Rh<sub>2</sub>(<i>S</i>-biTISP)<sub>2</sub>-Catalyzed Asymmetric Functionalization of Indoles and Pyrroles with Vinylcarbenoids
作者:Yajing Lian、Huw M. L. Davies
DOI:10.1021/ol300632p
日期:2012.4.6
Asymmetric functionalization of N-heterocycles by vinylcarbenoids in the presence of catalytic amounts of Rh-2(S-biTISP)(2) has been successfully developed. This bridged dirhodium catalyst not only selectively enforces the reaction to occur at the vinylogous position of the carbenoid but also affords high levels of asymmetric induction.