3 documents found, page 1 of 1
Dammarane Triterpenoids from Carnauba, Copernicia prunifera (Miller) H. E. Moor...
Almeida,Buana C. de; Araújo,Bruno Q.; Barros,Elcio D. S.; Freitas,Sâmya D. L.; Maciel,Dayany S. A.; Ferreira,Ari J. S.; Guadagnin,Rafael C.Phytochemical investigation from carnauba (Copernicia prunifera) wax led to the identification of sixteen dammarane-type triterpenes, including thirteen new characterized as: (24R*)-methyldammara-20,25-dien-3α-ol and a mixture of alkyl (24R*)-methyldammar-25-en-20-ol-3β-carboxylates, together with three previously described triterpenes: carnaubadiol, (24R*)-methyldammara-20,25-dien-3β-ol and (24R*)-24-methyldam...
In vitro trypanocidal evaluation of pinane derivatives from essential oils of r...
Sartorelli,Patricia; Santana,Jefferson S.; Guadagnin,Rafael C.; Lago,João Henrique G.; Pinto,Érika G.; Tempone,André G.; Stefani,Hélio A.Essential oils of ripe fruits from Schinus terebinthifolius (Anacardiaceae), obtained using a pilot extractor and a Clevenger apparatus were chemically characterized. Due the high amount of (-)- α-pinene in both oils, this monoterpene was tested against the protozoan parasite Trypanosoma cruzi, showing a moderate potential (IC50 63.56 µg/mL) when compared to benznidazole (IC50 43.14 µg/mL). Otherwise, (-)- α-pi...
Copper catalyzed cross-coupling reactions of diaryl ditellurides with potassium...
Alves,Diego; Pena,Jesus M.; Vieira,Adriano S.; Botteselle,Giancarlo V.; Guadagnin,Rafael C.; Stefani,Hélio A.We present here results of the cross-coupling reaction of diaryl ditellurides with potassium aryltrifluoroborate salts using a catalytic amount of Cu(OAc)2 and bypiridine in DMSO/H2O under air atmosphere. This cross-coupling reaction is general and was performed with diaryl ditellurides and potassium aryltrifluoroborate salts bearing electron-withdrawing, electron-donating and neutral substituents, affording th...