The cycloaddition of the gem-dimethylcyclopropenic methyl ester 1 with the morpholinospiro [2,5] octene 2, followed by solvolytic ring cleavage of the 2-morpholinobicyclo [2.1.0] pentane adduct provides the key sequence for the synthesis of 2,3-dihydro Illudine M 18, closely related to the natural antitumoral and antibacterial Illudine M.
The cycloaddition of the gem-dimethylcyclopropenic methyl ester 1 with the morpholinospiro [2,5] octene 2, followed by solvolytic ring cleavage of the 2-morpholinobicyclo [2.1.0] pentane adduct provides the key sequence for the synthesis of 2,3-dihydro Illudine M 18, closely related to the natural antitumoral and antibacterial Illudine M.