Heterocycles p. 743 - 749 (1993)
Update date:2022-08-11
Topics:
Ohta, Shunsaku
Sano, Atsunori
Yamashita, Masayuki
Okamoto, Masao
Photochemical Fries rearrangement of 1-phenyl-2-pyrrolidone (1) proceeded smoothly in methanol especially in the presence of piperylene.Continous photo-irradiation of 1 successfully was carried out to raise the yield by utilizing a reaction mixture-circulation system containing of a spiral quartz cell, a pump, a uv light source and a column packed with appropriate absorbents for the Fries rearranged product (3) and pigments.
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