Process for the preparation of...

Details Process for the preparation of... Process for the preparation of...

2008-02-06

2010-06-01

Seaman, D. Margaret (Department: 1625)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07728154

ABSTRACT:
1-aryl-3,4-dihydro-1H-naphthalene-2-one is prepared by isomerizing an epoxy compound represented by the following general formula,wherein a is an integer of 0 to 5, b is an integer of 0 to 4, and R1to R6are hydrogen atoms or substituents such as alkyl groups,in an organic solvent in the presence of magnesium sulfate. This process makes it possible to prepare the 1-aryl-3,4-dihydro-1H-naphthalene-2-one safely and in a high yield without using highly explosive compounds such as lithium perchlorate.

REFERENCES:
patent: 4296257 (1981-10-01), Cardenas et al.
patent: 5817890 (1998-10-01), Duhamel et al.
Jensen et al. Tetrahedron Letters 41, 6029-6033, 2000.
Misono et al., The Journal of Physical Chemistry, vol. 76, No. 1, 1972, pp. 44-49, XP009103079.
Jensen et al., Tetrahedron Letters, vol. 41, No. 32, pp. 6029-6033, Aug. 5, 2000, XP004243507.

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