Total synthesis and stereostructure of methyl (E)-O-methylmulticolanate, a 4-ylidenetetronic acid from Penicillium multicolor
Abstract
A total synthesis of methyl (E)-O-methylmulticolanate (9), and its geometrical isomer (8), is described; the stereostructure of (9) was established by comparative spectral studies and X-ray analysis of the synthetic analogue (6).