Process for synthesizing 1,5...

Details Process for synthesizing 1,5... Process for synthesizing 1,5...

2006-12-05

2006-12-05

Wilson, James O. (Department: 1626)

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

Reexamination Certificate

active

07145003

ABSTRACT:
A process for synthesizing 1,5-Dinosyl-3,3,7,7-tetrakis(difluoramino) octahydro-1,5-diazocine (DNTDFD) by reacting tetrahydro-1,5-bis(4-nitrobenzenesulfonyl)-1,5-diazocine-3,7-(2H, 6H) dione with HNF2/oleum initially approximately between −5 and 0 degrees C., and allowing the temperature to rise to between 10 degrees C. and ambient temperature during said reaction to initiate difluoramination producing product DNTDFD. A 2:1 mixture of FREON® 11 refrigerant and pentane or cyclopentane, or pentane alone is used as a diluent and absorbent for the reagent difluoramine. The present invention reduces the time required to produce DNTDFD from about two weeks to one to three days and reduces the need to use relatively large quantities of FREON® 11, a compound which is damaging to the environment.

REFERENCES:
patent: 6310204 (2001-10-01), Chapman et al.
patent: 6395899 (2002-05-01), Chapman et al.
patent: 6417355 (2002-07-01), Chapman et al.
patent: 2002/0007063 (2002-01-01), Chapman et al.
patent: 2002/0161248 (2002-10-01), Chapman et al.

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