88207-81-2Relevant academic research and scientific papers
New chloro depsides from the Lichen Lecanora lividocinerea
Elix, John A.,Barclay, Caroline E.,Lumbsch, H. Thorsten,Wardlaw, Judith H.
, p. 971 - 975 (2007/10/03)
The new depsides 3,5-dichloro-2′-0-methylnorstenosporic acid (4), 5-chloro-2′-o-methylanziaic acid (5) and 3,5-dichloro-2′-0-methylnorhyperlatolic acid (6) have been detected in the lichen Lecanora lividocinerea and the structures of these metabolites have been established by unambiguous synthesis. In addition, the synthesis of the depside 3,5-dichloro-4-0-demethylplanaic acid (7) is described.
The Synthesis and Ring-contraction of Halogenated Hydroxyquinones; a New Synthesis of Cryptosporiopsin
Henderson, Graeme B.,Hill, Robert A.
, p. 2595 - 2599 (2007/10/02)
Syntheses of 2,6-dichloro- and 2,6-dibromo-3-hydroxy-5-alkyl-1,4-benzoquinones have been developed involving oxidation of trihalogenoresorcinol derivatives with Fremy's salt.The reactions of these quinones have been studied and their ring-contraction to cyclopentenoid structures on treatment with N-halogenosuccinimides is reported.This sequence of reactions has been used in an efficient synthesis of the fungal metabolite cryptosporiopsin.
