Unusual chromenes from Peperomia blanda.

نویسندگان

  • Leosvaldo S M Velozo
  • Marcelo J P Ferreira
  • Maria Isabel S Santos
  • Davyson L Moreira
  • Vicente P Emerenciano
  • Maria Auxiliadora C Kaplan
چکیده

From the methanol extract of the aerial parts of Peperomia blanda (Piperaceae), two chromenes were isolated and characterized mainly through application of 2D-NMR spectroscopy. The structures were 2S-(4-methyl-3-pentenyl)-6-formyl-8-hydroxy-2,7-dimethyl-2H-chromene and 2S-(4-methyl-3-pentenyl)-5-hydroxy-6-formyl-2,7-dimethyl-2H-chromene named as blandachromenes I and II, respectively.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

VCD to determine absolute configuration of natural product molecules: secolignans from Peperomia blanda.

The absolute configuration and solution-state conformers of three peperomin-type secolignans isolated from Peperomia blanda (Piperaceae) are unambiguously determined by using vibrational circular dichroism (VCD) spectroscopy associated with density functional theory (DFT) calculations. Advantages of VCD over the electronic form of CD for the analysis of diastereomers are also discussed. This wo...

متن کامل

New prenylated quinones from Peperomia galioides.

Two new prenylated quinones, piperogalone (1) and galopiperone (2), and a new prenylated dihydroquinone, hydropiperone (3), were isolated from Peperomia galioides H.B.K (Piperaceae). Hydropiperone exhibited potent antiparasitic activity against three species of Leishmania.

متن کامل

Ethno-medicinal, Phytochemical and Pharmacological review of an amazing medicinal herb Peperomia pellucida (L.) HBK

Peperomia pellucida (L.) HBK (Fam. Piperaceae) has been used as a (Rasayan) drug in the Ayurvedic system of medicines. Peperomia pellucida is reported to posse antipyretic, analgesic, anti-inflammatory, antimicrobial, refrigerant and CNS activity. Traditionally it is used in the treatment of headache, fever, eczema, abdominal pains, and convulsions. In traditional Ayurvedic system of medicine i...

متن کامل

Base catalysed synthesis of thiochromans and azo-linked chromenes using allenylphosphonates.

An efficient base catalysed approach to the synthesis of thiochromans/chromenes from allenylphosphonates (and an allenoate) and substrates having SH/OH and CHO groups at appropriate positions has been developed. Several azo-linked chromenes that are bright red pigments are also synthesized. This methodology involves the domino reactions of Michael addition and subsequent cyclisation by intramol...

متن کامل

Feulgen banding of heterochromatin in plant chromosomes.

Feulgen bands can be obtained at the sites of constitutive heterochromatin in the chromosomes of Anemone blanda, Fritillaria lanceolata and Scilla siberica, simply by means of a short or extended acid hydrolysis. Extended hydrolysis gives positive bands in A. blanda and F. lanceolata and negative bands in S. siberica. Short hydrolysis gives no bands in A. blanda and S. siberica but gives negati...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Phytochemistry

دوره 67 5  شماره 

صفحات  -

تاریخ انتشار 2006