The halogen substituted anthranilic acid(1) was condensed with acetic anhydride to give halogen substituted 3 methyl 1H 2,4 benoxazin 1 one(2), which was further condensed with hydrazide (3) to give twelve novel halogen substituted 2 (3 methyl 5 substitued 4H 1,2,4 triazol 4 yl) benzoic acid. All compounds synthesized were identified by 1H NMR and elemental analyses.
The components extracted by petroleum ether from a Chinese herb - Rabdosina Serra(Maxim.) Hara were separated and detectedby GAS CHROMATOGRAPH ELECTRON IONIZATION DETECTOR. Their structures were searched and identified by HPNBS75K data base and proved that there are fifteen known compounds in this herb.
A facile and efficient diastereoselective synthesis of 7 epi γ eudesmol starting from(-) dihydrocarvone has been carried out in 5 steps at the first time. [WT5HZ]
