𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Complete assignments of 1H and 13C NMR data for two 3β,8β-epoxymexicanolides from the fruit of a Chinese mangrove Xylocarpus granatum

✍ Scribed by Jun Wu; Zhihui Xiao; Yang Song; Si Zhang; Qiang Xiao; Cha Ma; Haixin Ding; Qingxin Li

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
100 KB
Volume
44
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Three 3β,8β‐epoxymexicanolides, including xyloccensin K, 6‐acetoxycedrodorin and a new one named xyloccensin W, were isolated from the fruit of a Chinese mangrove Xylocarpus granatum. Their structures were determined by spectroscopic analyses. The first complete assignment of ^1^H and ^13^C NMR data for xyloccensin W was achieved by means of 2D NMR techniques, including ^1^H‐^1^H COSY, HSQC, HMBC and NOESY spectra. In addition, the confusion of ^1^H and ^13^C NMR data previously reported for xyloccensin K was clarified. Copyright © 2005 John Wiley & Sons, Ltd.

📜 SIMILAR VOLUMES

Complete assignments of 1H and 13C NMR d
Complete assignments of 1H and 13C NMR data for rings A,B-seco limonoids from the seed of Aphanamixis polystachya
✍ Huaping Zhang; Feng Chen; Xi Wang; Dagang Wu; Qing Chen 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 115 KB

## Abstract Seven rings A,B‐__seco__ limonoids 1–7 were isolated from the EtOH extract of the seed of __Aphanamixis polystachya__. Their structures were identified as rohituka‐7 (1), dregeana‐1 (2), rohituka‐15 (3), Tr‐B (4), rohituka‐3 (5), rohituka‐5 (6), and rohituka‐14 (7) by MS and NMR spectro

Complete 1H and 13C NMR assignment of en
Complete 1H and 13C NMR assignment of ent-3β,16α-atisanediol, a cytotoxic diterpene isolated from the sponge Spirastrella cunctatrix
✍ Francesco Cafieri; Ernesto Fattorusso; Yosef Mahajnah; Alfonso Mangoni 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 392 KB

Full assignment of the 'H and 13C NMR spectra of ent-atisane-3fl,16adiol, a cytotoxic diterpene isolated from the Caribbean sponge Spirustrellu cunctatrix, was achieved by extensive use of two-dimensional NMR spectroscopy and spectral simulation. This is the first complete NMR characterization af an

Complete assignment of the 1H and 13C NM
Complete assignment of the 1H and 13C NMR spectra of 8-hydroxy-7-methoxy-4-methyl-1α,4α,4aα,8β,8aα-tetrahydro-1,4-methanonaphthalen-5(1H)-one
✍ David E. Minter; Alar P. Marchand; Shao-Po Lu 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 380 KB

## Abstract Diels–Alder cycloaddition of a mixture of 1‐ and 2‐methylcyclopentadienes (1a and 1b, respectively) to 2‐methoxy‐__p__‐benzoquinone (2) gave a mixture of isomeric __endo__ [4 + 2] cycloadducts (3a–3d). Fractional recrystallization of this product mixture from EtOAc‐hexane gave 6‐methoxy