Synthesis and Antimicrobial Activities of Some Sulphur Containing Chromene Derivatives

A series of 3,3-dimethyl-3Hbenzothieno[3,2-f][1]-benzopyran analogues modified at the pyran 1,2-double bond were synthesized. The corresponding dihydro and (+/-)-cis-diol derivatives were converted into diacetate and cyclic carbonate upon acylation. The title compounds were characterized by spectroscopic analysis and screened for their antimicrobial activity in vitro

¹³C NMR and other spectral data of 4-methylthiocanthin-6-0ne- from <i>Quassia Africana</i>

Bull. Chem. Soc. Ethiop. 1993, 7(2) 121-124

13C NMR and other spectral data of 4-methylthiocanthin-6-0ne- from Quassia Africana

Bull. Chem. Soc. Ethiop. 1993, 7(2) 121-124

3-Substituted Coumarins from the Twigs of Rhadinothamnus rudis ssp. amblycarpus.

International audienc

Picrotoximaesin, a novel picrotoxane sesquiterpenoid from the berries of <i>Maesobotrya floribunda</i>

A new picrotoxane sesquiterpenoid, picrotoximaesin (1), has been isolated from the methanol extract of the seeds of Maesobotrya floribunda. The structure and absolute configuration of the compound were determined using 1H NMR, 13C NMR, EIMS, and X-ray crystallography