Expedient synthesis of indoles from N-Boc arylhydrazines
作者:Young-Kwan Lim、Cheon-Gyu Cho
DOI:10.1016/j.tetlet.2004.01.011
日期:2004.2
The readily available N-Boc arylhydrazines undergo efficient Fischer cyclizations to provide the indoles in good yields, when reacted with enolizable ketones.
Iridium- and ruthenium-catalysed synthesis of 2,3-disubstituted indoles from anilines and vicinal diols
作者:Matyas Tursky、Linda L. R. Lorentz-Petersen、Lasse B. Olsen、Robert Madsen
DOI:10.1039/c0ob00106f
日期:——
A straightforward and atom-economical method is described for the synthesis of 2,3-disubstituted indoles. Anilines and 1,2-diols are condensed under neat conditions with catalytic amounts of either [Cp*IrCl2]2/MsOH or RuCl3·xH2O/phosphine (phosphine = PPh3 or xantphos). The reaction does not require any stoichiometric additives and only produces water and dihydrogen as byproducts. Anilines containing
Synthesis and rearrangements of 7H-pyrrolo[3,2-e][1,2,4]triazolo[1,5-c]-and 7h-pyrrolo[3,2-e][1,2,4]triazolo[4,3-c]pyrimidines
作者:E. V. Vorob’ev、E. S. Kurbatov、V. V. Krasnikov、V. V. Mezheritskii、E. V. Usova
DOI:10.1007/s11172-006-0445-2
日期:2006.8
Abstract7H-Pyrrolo[3,2-e][1,2,4]triazolo[1,5-c]pyrimidines were synthesized by the reactions of 2-ethoxymethyleneamino-1H-pyrrole-3-carbonitriles with acid hydrazides and by the reactions of aminoiminopyrimidines (prepared based on the above-mentioned carbonitriles) with acid chlorides.
Compounds of the general formula (I):
1
or a salt thereof, wherein R
1
is hydrogen, hydroxyl or halogen; R
2
is NHSO
2
CH
3
, SO
2
NHCH
3
or the like; R
5
and R
6
each independently is hydrogen, C
1-6
alkyl, optionally substituted phenyl or optionally substituted benzyl; X is NH, sulfur, oxygen or methylene; Y is oxygen, NR
7
, sulfur, methylene or a bond; and * represents an asymmetric carbon atom.
The compounds are useful as a medicine for treating or preventing diabetes, obesity, hyperlipidemia, digestive diseases, depression or urinary disturbances.
Compounds of the general formula (I):
or a salt thereof, wherein R
1
is hydrogen, hydroxyl or halogen; R
2
is NHSO
2
CH
3
, SO
2
NHCH
3
or the like; R
5
and R
6
each independently is hydrogen, C
1-6
alkyl, optionally substituted phenyl or optionally substituted benzyl; X is NH, sulfur, oxygen or methylene; Y is oxygen, NR
7
, sulfur, methylene or a bond; and * represents an asymmetric carbon atom. The compounds are useful as a medicine for treating or preventing diabetes, obesity, hyperlipidemia, digestive diseases, depression or urinary disturbances.