.alpha.,.alpha.-Dimethoxy-o-xylylene [5-(dimethoxymethylene)-6-methylene-1,3-cyclohexadiene]: formation by 1,4-elimination and electrocyclic routes and reactions
.alpha.,.alpha.-Dimethoxy-o-xylylene [5-(dimethoxymethylene)-6-methylene-1,3-cyclohexadiene]: formation by 1,4-elimination and electrocyclic routes and reactions