The dithiophenes and trithiophenes reviewed in this article are part of a large group of biogenetically related molecules found in plants of the family Compo sitae (Asteraceae). They include compounds having a variable number of unsaturations, particularly double bonds and triple bonds, which occur singly or in combinations. The first report of a naturally occurring trithiophene, ex-terthienyl in the flowers of Tagetes erecta, appeared in 1947 (270); the first naturally occurring dithiophene was isolated from Bidens radiata and described in 1961 (142). The book Naturally Occurring Acetylenes,...
The dithiophenes and trithiophenes reviewed in this article are part of a large group of biogenetically related molecules found in plants of the famil...
La composition particuliere des lipides des Bacteries justifie pleinement la redaction de la presente revue; en effet, les Bacteries elaborent des lipides dont la composition est tres differente de celle des lipides des autres organismes, que ce soient des Champignons, des Algues ou des Animaux superieurs. L'interet porte actuellement a 1'etude des lipides bacteriens est egalement justifie par 1'importance biologique de certaines fractions lipidiques. Le domaine que nous allons resumer est d' ailleurs encore peu developpe; a part des etudes nombreuses et tres detaillees sur les lipides des...
La composition particuliere des lipides des Bacteries justifie pleinement la redaction de la presente revue; en effet, les Bacteries elaborent des lip...
