Method for producing .alpha.,.alpha.-dimethyl-.DELTA.-valerolact

Details Method for producing .alpha.,.alpha.-dimethyl-.DELTA.-valerolact Method for producing .alpha.,.alpha.-dimethyl-.DELTA.-valerolact

1986-10-16

1988-03-29

Milestone, Norma S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

562602, 562598, C07D30930

Patent

active

047345110

ABSTRACT:
A method for producing .alpha.,.alpha.-dimethyl-.delta.-valerolactone which comprises carrying out the addition reaction of hydrogen bromide and 2,2-dimethyl-4-pentenoic acid in the presence or absence of a catalyst to synthesize 2,2-dimethyl-5-bromovaleric acid which is then subjected to ring-closure reaction by alkali treatment.

REFERENCES:
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T. Ikariya et al., Bull Chem. Soc. of Japan, 57 897-898, (1984).
J. L. Herrmann et al., J.C.S., Chem. Comm., (1973), 711-712.
Y. Takahashi et al., Chem. Lett., (1982), 1187-1188.
Y. Tamaru et al., J. Org. Chem., 48, 1286-1292, (1983).
Y. Ishii et al., Tetrahedron Letters, vol. 24(26), (1983), pp. 2677-2680.
Organic Syntheses, Collective, vol. 4, pp. 601-602.
I. Sircar et al., J. Med. Chem., (1983), vol. 26, pp. 1020-1027.

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