Enantioselective Dearomative Arylation of Isoquinolines
作者:Ming Zhang、Wangsheng Sun、Gongming Zhu、Guangjun Bao、Bangzhi Zhang、Liang Hong、Min Li、Rui Wang
DOI:10.1021/acscatal.6b01693
日期:2016.8.5
important group and are interesting structural motifs found in many natural products and pharmaceuticals. In this context, a phosphoric-acid-catalyzed enantioselective dearomative arylation of isoquinolines was realized, providing the chiral dihydroisoquinolines with indole substituents at the C1-position in good results (up to >99% yield and 97% ee). The reaction features mild reaction conditions
C 1取代的四氢异喹啉和1,2-二氢异喹啉构成一个重要的基团,并且是在许多天然产物和药物中发现的有趣的结构基序。在此情况下,实现了磷酸催化的异喹啉对映选择性脱芳芳基化,为手性二氢异喹啉在C1位上带有吲哚取代基提供了良好的结果(产率高达99%和ee达97%)。该反应具有温和的反应条件和操作简便性,这使其成为发现生物学上有趣的α-吲哚异喹啉的一种有吸引力的方法。
Latent Nucleophiles in Lewis Base Catalyzed Enantioselective
<i>N</i>
‐Allylations of N‐Heterocycles
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
A highly enantioselective 1,2-aza-Friedel–Crafts reaction of N-tert-butyldimethylsilylindole with N-tert-butoxycarbonyl aromatic imines is demonstrated using a BINOL-derived monophosphoric acid catalyst. The present approach provides efficient access to 3-indolylmethaneamines with aryl substituents in excellent enantioselectivities (up to 98 % ee). An inversion in the sense of enantioselection was
Chemo- and Regioselective C(sp<sup>3</sup>)H Arylation of Unactivated Allylarenes by Deprotonative Cross-Coupling
作者:Nusrah Hussain、Gustavo Frensch、Jiadi Zhang、Patrick J. Walsh
DOI:10.1002/anie.201309084
日期:2014.4.1
Transmetalation of the resulting allyllithium intermediate to LPdAr(Br) and reductive elimination provide the 1,1‐diarylprop‐2‐enes, which are not accessible by the Heck reaction. The regioselectivity in this deprotonative cross‐coupling process is catalyst‐controlled and very high.
SmI<sub>2</sub>-mediated dimerization of indolylbutenones and synthesis of the myxobacterial natural product indiacen B
作者:Nils Marsch、Peter G Jones、Thomas Lindel
DOI:10.3762/bjoc.11.184
日期:——
The synthesis and reactivity of indolederivatives substituted in the benzene section was studied. Starting materials 4- and 6-iodoindole were conveniently prepared via the Batcho-Leimgruber route and purified by sublimation. Novel vicinally indolyl-substituted cyclopentanols with unexpected cis-configuration were formed by SmI2-mediated reductive dimerization of a 4-(indol-6-yl)butenone, obtained