𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Unusual p-Coumarates from the Stems of Vaccinium myrtillus

✍ Scribed by Simona Hybelbauerová; Jan Sejbal; Martin Dračínský; Iva Rudovská; Bohumír Koutek

Publisher
John Wiley and Sons
Year
2009
Tongue
German
Weight
228 KB
Volume
92
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

The two previously unreported esters 1 and 2 of pentane-2,4-diol and p-coumaric acid (¼ 3-(4hydroxyphenyl)prop-2-enoic acid) along with 13 known compounds including 6 oleanane-and ursanetype triterpenoids were isolated from MeOH extracts of the stems of Vaccinium myrtillus. The structures of the new compounds were assigned as (2S,4R)-4-(b-d-glucopyranosyloxy)pentan-2-yl (2E)-pcoumarate (1) and its aglycone 2 on the basis of 1D-and 2D-NMR spectroscopic analyses of the isolated and synthesized compounds and molecular modelling experiments. This is the first report on the occurrence of a chiral pentane-2,4-diol linker between the phenol-derived acid and a glycoside part in natural products.

📜 SIMILAR VOLUMES

Two New Abietane Diterpenoids from the S
Two New Abietane Diterpenoids from the Stems of Clerodendrum kaichianum P. S. Hsu
✍ Mingfeng Xu; Lianqing Shen; Kuiwu Wang; Qizhen Du 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 German ⚖ 156 KB

## Abstract Two new abietane diterpenoids, named 17‐hydroxyteuvincenone G (**1**) and 17‐hydroxyteuvincen‐5(6)‐enone G (**2**), together with four known diterpenoids, were isolated from the stems of __Clerodendrum kaichianum__ P. S. Hsu. Their structures were elucidated by extensive NMR and MS anal

The specificity and the ability of Asper
The specificity and the ability of Aspergillus feruloyl esterase to release p-coumaric acid from complex cell walls of oat hulls
✍ Peiqiang Yu; John J McKinnon; David D Maenz; Vern J Racz; David A Christensen 📂 Article 📅 2004 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 118 KB

## Abstract __p__‐Coumaric acid (4‐hydroxycinnamic) and ferulic acid (4‐hydroxy‐3‐methoxycinnamic), two major hydroxycinnamic acids found in the complex cell walls of oat hulls, act as cross‐linking agents between lignin and polysaccharides or between polysaccharides. As such, they are inhibitory t

Structure elucidation and NMR assignment
Structure elucidation and NMR assignments of two new triterpenoids from the stems of Paragonia pyramidata (Bignoniaceae)
✍ Xiao-Ling Wang; Anne-Emmanuelle Hay; An Matheeussen; Mahabir P. Gupta; Kurt Host 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 141 KB

## Abstract Phytochemical investigation of dichloromethane (DCM) extract from the stems of __Paragonia pyramidata__ var. __pyramidata__ L. Rich. (Bur.) resulted in the isolation and characterization of two new triterpenoids 3β,19β‐dihydroxylup‐12, 20(29)‐diene‐28‐oic acid (1) and 3β,19β‐dihydroxylu

Unusual composition of the essential oil
Unusual composition of the essential oils from the leaves of Piper aduncum
✍ Roser Vila; Félix Tomi; Marisa Mundina; Ana I. Santana; Pablo N. Solís; José B. 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 74 KB 👁 2 views

## Abstract The chemical compositions of the essential oils from the leaves of __Piper aduncum__ from Panama and Bolivia were investigated by GC‐FID, GC‐MS and ^13^C‐NMR. In total, 55 components were identified representing 99.3 and 80.3% of each sample, respectively. The oil from Panama was charact