Method for producing nitriles by elimination of water from...

Details Method for producing nitriles by elimination of water from... Method for producing nitriles by elimination of water from...

2008-07-29

2008-07-29

Witherspoon, Sikarl A (Department: 1621)

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

Organic compounds

Nitriles

C558S411000

Reexamination Certificate

active

07405318

ABSTRACT:
The invention relates to a method for producing the nitrites of formula: R1—CN by reacting aldehyde oximes (R1CN═N—OH) with cyclic alkylphosphonic anhydrides at a temperature ranging from −100 to +120° C., wherein R1represents H, a linear or branched C1-C12alkyl group, a C3-C10cycloalkyl, alkenyl or an aryl or heteroaryl group. The cyclic phosphonic anhydride preferably used is a 2,4,6-substituted 1,3,5,2,4,6-trioxatriphosphinane-2,4,6-trioxide of formula (I), wherein R′ independently represents allyl, aryl or open-chain or branched C1to C12alkyl groups. Optionally, the reaction can be carried out in the presence of a tertiary amine base NR23

REFERENCES:
patent: 0 370 399 (1990-05-01), None
patent: 0 550 762 (1993-07-01), None
patent: WO 86/04577 (1986-08-01), None
patent: WO 98/05630 (1998-02-01), None

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