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Synlett null; null: 840-840
DOI: 10.1055/s-0029-1219555

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett null; null: e4-e4
DOI: 10.1055/s-0029-1219398

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett null; null: 839-839
DOI: 10.1055/s-0029-1219556

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett
DOI: 10.1055/s-0029-1219380

Abstract

The first Suzuki-Miyaura reactions of 2,3,4-tribromothiophene
are reported. These reactions provide a convenient and site-selective
approach to 2-aryl-3,4-dibromothiophenes, 2,4-diaryl-3-bromothiophenes,
and 2,3,4-triarylthiophenes.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett null; null: A22-A32
DOI: 10.1055/s-0029-1219529

© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved. This journal, including all individual contributions and illustrations published therein, is legally protected by copyright for the duration of the copyright period. Any use, exploitation or commercialization outside the narrow limits set by copyright legislation, without the publisher’s consent, is illegal and liable to criminal prosecution. This applies in particular to photostat reproduction, copying, cyclostyling, mimeographing or duplication of any kind, translating, preparation of microfilms, and electronic data processing and storage.

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Synlett
DOI: 10.1055/s-0029-1219396

Abstract

The Suzuki-Miyaura reaction of the bis(triflate) of
3,4-dihydroxybenzophenone with two equivalents of boronic acids gave
3,4-diarylbenzophenones. The reaction with one equivalent of arylboronic
acids resulted in site-selective attack onto carbon atom C-4. 3,4-Diarylbenzophenones
containing two different aryl groups were prepared by sequential
addition of two different boronic acids.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett
DOI: 10.1055/s-0029-1219395

Abstract

An efficient one-pot procedure for the synthesis of 2-aminobenzimidazoles
from isoselenocyanates and various substituted diamines is described.
Precipitation of elemental selenium from the reaction mixture greatly
simplifies the purification procedure and also allows it to be re-used
for preparation of isoseleno­cyanates. A possible mechanism
for the formation of 2-aminobenzimidazoles is proposed.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett
DOI: 10.1055/s-0029-1219533

Abstract

A series of 5-substituted morpholin-2-one-3-carbox­amide
derivatives were efficiently synthesized by a Ugi three-­component
reaction involving chiral 5,6-dihydro[1,4]oxazin-2-one substrates,
isocyanides and carboxylic acids. The newly formed chiral center
in the product was obtained in good diastereoselectivity.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett
DOI: 10.1055/s-0029-1219538

Abstract

Chiral Lewis acid catalyzed Diels-Alder cycloadditions between β-substituted
pyrazolidinone propiolimides and cyclic dienes have been studied.
A catalyst prepared from Sc(OTf) and ­-Bu-pybox ligand promotes the formation
of enantioenriched diene cycloadducts in moderate to high yield
and good enantioselectivity from the reactions of acetylenic dienophiles
and cyclic dienes.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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Synlett
DOI: 10.1055/s-0029-1219537

Abstract

A 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-catalyzed stereoselective [5+1] annulation
of divinyl ketones and isocyano­acetate was disclosed,
which provided a facile and efficient route to 1-amino-2,5-diarylcyclohexanecarboxylic
acids as novel constrained cyclohexane analogues of phenylalanine.
[...]

© Georg Thieme Verlag
Stuttgart ˙ New York

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