Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1980-07-07
1982-05-04
Helfin, Bernard
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568437, 562410, C07C 4528
Patent
active
043283748
ABSTRACT:
A process for the production of aromatic dialdehydes which comprises reacting xylene chloride selected from the group consisting of .alpha.,.alpha.,.alpha.'-trichloroxylene alone, or a mixture of .alpha.,.alpha.,.alpha.'-trichloroxylene and .alpha.,.alpha.'-dichloroxylene, a mixture of .alpha.,.alpha.,.alpha.'-trichloroxylene and .alpha.,.alpha.,.alpha.',.alpha.'-tetrachloroxylene and a mixture of .alpha.,.alpha.,.alpha.'-trichloroxylene, .alpha.,.alpha.'-dichloroxylene and .alpha.,.alpha.,.alpha.',.alpha.'-tetrachloroxylene with nitric acid.
REFERENCES:
patent: 2948756 (1960-08-01), Bengelsdorf
Migrdichian, Organic Synthesis, vol. 2, (1957), 1331.
Patai, The Chemistry of the Carbonyl Group (1966), 181-183.
CA 53 1222.sup.a -Preparation of m-phthalic dialdehyde dated 1959 at p. 1222.
CA 65 5405.sup.b -Terephthaldialdehyde dated 1966 at p. 5405.
Doya Masaharu
Yoshinaka Shigeo
Helfin Bernard
Mitsubishi Gas Chemical Co. Inc.
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