No abstract

The essential oils of the flowers, leaves and stems of Anthemis altissima growing wild in Iran were separately obtained by hydrodistillation and analysed by GC-MS. A total of 123 components were identified in the essential oils of the investigated organs. The main components of the flower and leaf essential oils were β-caryophyllene (25.3% and 17.2%), caryophyllene-oxide (6.5% and 9.6%) and spathulenol (5.4% and 17.4%), respectively. Non-terpenic compounds were the main components of the stem oil. Palmitic acid (39.6%) and linoleic acid The flowers, leaves and stems of the plant were air-dried at ambient temperature in the shade and the essential oil was obtained by hydrodistillation using a Clevenger-type apparatus for 5 h. The obtained oils were dissolved in n-hexane (Merck), dried over anhydrous sodium sulphate and stored at 4-6°C. Analysis of the OilGC analysis was carried out using a Varian GC 3600 chromatograph equipped with DB-5 column (30 m × 0.25 mm i.d., film thickness 0.25 µm), with N 2 as the carrier gas at a flow rate of 0.8 ml/min. Oven temperature was programmed as follows: 60°C to 260°C at 3°/min; injector and detector temperatures, 240°C and 250°C, respectively. GC-MS analysis was carried out using a Hewlett-Packard 6890 operating at 70 eV ionization energy, equipped with a HP-5 capillary column (phenyl methyl siloxane, 30 m × 0.25 mm i.d.) with He as the carrier gas, a flow rate of 0.8 ml/min and split ratio of 1:10. Oven temperature was programmed as follows: 60°C to 260°C at 3°/min; injector temperature, 250°C. Retention indices were determined by using retention times of n-alkanes that had been injected after the essential oil under the same chromatographic conditions. The retention indices for all the components were determined

Deoxygenation of sulfoxides to thioethers and reductive coupling of sulfonyl chlorides, sodium sulfinates and thiosulfonates to their corresponding disulfides were carried out by a heterogeneous phosphine reagent, Silphos [PCl 3-n (SiO 2 ) n ] and molecular I 2 in dry refluxing MeCN in high yields.

No abstract