Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1985-08-05
1987-05-12
Berch, Mark L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
528 67, 564160, C07D24112
Patent
active
046651780
ABSTRACT:
2,5-di-(4'-isocyanatobutyl)-3,6-dimethylpyrazine which corresponds to the formula ##STR1## is produced by phosgenating 2,5-di-(4'-aminobutyl)-3,6-dimethylpyrazine. The 2,5-di-(4'-isocyanatobutyl)-3,6-dimethylpyrazine is particularly useful as an isocyanate component for the production of polyurethanes.
REFERENCES:
patent: 4107199 (1978-08-01), Konig
patent: 4122128 (1978-10-01), Lehman
patent: 4150229 (1979-04-01), Rajappa et al.
Bayer Aktiengesellschaft
Berch Mark L.
Gil Joseph C.
Harsh Gene
Teoli, Jr. William A.
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