Catalytic Diastereo- and Enantioselective Annulations between Transient Nitrosoalkenes and Indoles
作者:Yu Zhang、David Stephens、Graciela Hernandez、Rosalinda Mendoza、Oleg V. Larionov
DOI:10.1002/chem.201203435
日期:2012.12.21
Caught in transition: An efficient catalytic system is the key to the successful development of the first highly diastereo‐ and enantioselectiveannulation reaction betweenindoles and transientnitrosoalkenes. This robust reaction affords structurally unique architectures with up to three new chiral centers. The products can be readily elaborated into other indoline‐based chiral heterocyclic motifs
Fast, efficient Ru(iv)-catalysed regioselective allylation of indoles using allyl alcohol (without additives) under mild conditions
作者:Alexey B. Zaitsev、Stefan Gruber、Paul S. Pregosin
DOI:10.1039/b710763c
日期:——
The new Ru(IV) salt, [Ru(eta(3)-C(3)H(5))(Cp*)(CH(3)CN)(2)](PF(6))(2), is an excellent catalyst for the regioselective allylation of a variety of indole compounds usingallylalcohol as substrate; there are no co-catalysts required in this chemistry and the yields and reaction conditions are very favorable.
作者:Gergely L. Tolnai、Stephanie Ganss、Jonathan P. Brand、Jérôme Waser
DOI:10.1021/ol3031389
日期:2013.1.4
The first C2-selective alkynylation of indoles using the hypervalent iodine reagent triisopropylsilylethynyl-1,2-benziodoxol-3(1H)-one (TIPS-EBX) with Pd(II) as a catalyst is described. This convenient and robust method gives a single-step access to substituted alkynyl indoles with very high C2 selectivity. The reaction is orthogonal to classical Pd(0) cross-coupling reactions, as it is tolerant to
Insights into the structural patterns of the antileishmanial activity of bi- and tricyclic N-heterocycles
作者:Lizzi Herrera、David E. Stephens、Abigail D'Avila、Kathryn G. George、Hadi Arman、Yu Zhang、George Perry、Ricardo Lleonart、Oleg V. Larionov、Patricia L. Fernández
DOI:10.1039/c6ob01149g
日期:——
various structural patterns in a series of novel bi- and tricyclic N-heterocycles on the activity against Leishmania major and Leishmania panamensis has been studied and compounds that are active in the low micromolar region have been identified. Both quinolines and tetrahydrooxazinoindoles (TOI) proved to have significant antileishmanial activities, while substituted indoles were inactive. We have also
Aza-Claisen Rearrangement in the Cyclization Reactions of Nitrogen-Containing Enynes via Ruthenium Vinylidene Complexes
作者:Pei-Yun Chiang、Ying-Chih Lin、Yu Wang、Yi-Hong Liu
DOI:10.1021/om100292d
日期:2010.11.22
The cyclization reaction of several diallyl aromatic amine molecules, each containing an ethynyl group at the ortho position of the aromatic ring, is accompanied by an aza-Claisen rearrangement, causing an allyl group migration to give substituted indole compounds. This cyclization is catalyzed by ruthenium triphenylphosphine and diphenylphosphinoethane (dppe) complexes as well as gold complexes with