¹³C‐NMR‐Spektren von Monoterpenen

Abstract

Abstract-The 13C NMR spectra of nearly 100 rnonoterpenes show thatthey ar every useful for the characterisation of these compounds. This method is especially valuable for the elucidation of stereochemical problems. With the exception of a few cases the observed chemical shifts follow the common rules. The problems with measurements using shift reagents are discussed.

Fumigant Components from the Essential Oil ofEvodia RutaecarpaHort Unripe Fruits

“…Fractions that possessed fumigant toxicity, with similar TLC profiles, were pooled and further purified by preparative silica gel column chromatography (PTLC) until to obtain three pure compounds for determining structure ( Figure 1). The spectral data of β-myrcene (1) (1.2 g) matched with the previous report 14,15 . The data of β-ocimene (2) (1.7 g) matched with the previous report 14,16 .…”

“…The spectral data of β-myrcene (1) (1.2 g) matched with the previous report 14,15 . The data of β-ocimene (2) (1.7 g) matched with the previous report 14,16 . The spectral data were identical to the published data of α-phellandrene (3) (0.8 g) 14,16 .…”

Two New Monoterpene Glycosides and Trypanocidal Terpenoids from Dracocephalum kotschyi

“…Compounds 2-8 were identified as geranial (2), 4) neral (3), 4) b-sitosterol (4), 5) oleanolic acid (5), 6) ursolic acid (6), 7) p-mentha-8-en-1,2-diol (7), 8) and colosolic acid (8) 9) by comparison of their spectral data with those reported. Compound 1 was identified by the analysis of its NMR spectra as limonen-10-al (1).…”

The identification of structural fragments of enolic monoterpenes, enolic pheromones, and related natural products, from OH stretching vibration frequencies and relative intensities

“…The enols are diversely represented amongst physiologically active compounds (1)(2)(3)(4)(5)(6)(7)(8). Many important pheromones of the sex attractant (2-4) and the insect feedant types (1) possess enolic functions.…”

“…It has been shown that the position and configuration of the double bonds are responsible for the structure-reactivity relationship (2). In addition, a large number of retinols and monoterpenes possess the hydroxy-isoprene unit (5)(6)(7)(8).…”