Regioselectivities in the di-.pi.-methane photorearrangement of 2-methylbenzonorbornadienes carrying ar-methoxy and ar-cyano substituents. The vinylmethyl effect
Regioselectivities in the di-.pi.-methane photorearrangement of 2-methylbenzonorbornadienes carrying ar-methoxy and ar-cyano substituents. The vinylmethyl effect