名称:
Studies on the intramolecular [2+2] photocycloaddition of dihydro-4-pyrones
摘要:
Dihydropyrones 3 shown to undergo intramolecular photocycloaddition in high regioselectivity and good yields. The oxygen-heteroatom plays an important role in the regioselectivity of this reaction and in the subsequent fragmentations. Two possible approaches of the olefin to the cyclic enone have been described.
DOI:
10.1016/s0040-4039(00)61747-1