2002
DOI: 10.11606/1982-8837.pg.2002.64403
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Conceito de amor: comparação entre estudantes brasileiros e alemães

Abstract: Das Phänomen Liebe nicht - wie im Alltagsgebrauch - als substantielle Entität, sondern als kommunikativ erzeugte Lebenswirklichkeit zu begteifen, ist Ziel der Untersuchung gewesen. Zu diesem Zweck wurde eine vergleichende Fallstudie zum Liebeskonzept brasilianischer und deutscher Studenten durchgeführt. Theoretische Grundlage der Untersuchung bildete ein im weitesten Sinne konstruktivistisches Verständnis von Kommunikation als wirklichkeitserzeugendem Verhaltensbereich. In einer theoretischen Einführung wurde … Show more

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“…When the reaction was carried out at -5 o C and using triethylamine (NEt 3 /substrate = 1) as a base promoter, (S)-Ketoprofen was obtained in 95% ee. Compared with the literature [12][13][14][15][16][17][18][19][20] , these results are a significant improvement in terms of the enantioselective synthesis of (S)-Ketoprofen. It is worthwhile to mention that the racemic catalytic carbonylation and hydrovinylation reactions described herein should be transposable into an asymmetric variant if a suitable chiral catalyst is found and this work is in progress.…”
Section: Palladium-catalyzed Carbonylation Of 3-ethynylbenzo-phenone (4)mentioning
confidence: 78%
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“…When the reaction was carried out at -5 o C and using triethylamine (NEt 3 /substrate = 1) as a base promoter, (S)-Ketoprofen was obtained in 95% ee. Compared with the literature [12][13][14][15][16][17][18][19][20] , these results are a significant improvement in terms of the enantioselective synthesis of (S)-Ketoprofen. It is worthwhile to mention that the racemic catalytic carbonylation and hydrovinylation reactions described herein should be transposable into an asymmetric variant if a suitable chiral catalyst is found and this work is in progress.…”
Section: Palladium-catalyzed Carbonylation Of 3-ethynylbenzo-phenone (4)mentioning
confidence: 78%
“…Racemizing amide cleavage conditions did not afford (S)-Ketoprofen of sufficient enantiomeric purity and a later separation by recrystallisation of diastereoisomers resulting from reaction with (R)methylbenzylamine was necessary in order to obtain (S)-Ketoprofen in 96% ee. Another approach started from racemic Ketoprofen which was transformed into a ketene 18,19 . Diastereoselectivities for the addition of a chiral hydroxyl compound were, after saponication, Ketoprofen up to 71% for the chiral lactate 18 and up to 99% for (R)-pantolactone 19 .…”
Section: Introductionmentioning
confidence: 99%
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