Synthesis of 3-methoxy-6,16-dioxo-9αH-gibba-A-triene and stereochemistry of a Diels–Alder reaction
Abstract
A stereospecific synthesis of 3-methoxy-6,16-dioxo-9αH-gibba-A-triene has been achieved in good yield, starting with a Diels–Alder reaction, the major products from which violate the cis-addition principle.