Process for preparing N,N′-dialkoxy-N,...

Details Process for preparing N,N′-dialkoxy-N,... Process for preparing N,N′-dialkoxy-N,...

2008-04-15

2008-04-15

Kumar, Shailendra (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S159000

Reexamination Certificate

active

10570996

ABSTRACT:
The present invention provides a process for preparing an N,N′-dialkoxy-N,N′-dialkyl oxamide represented by the formula (3):wherein R2and R3may be the same or different from each other, and each represent an alkyl group having 1 to 4 carbon atoms,which comprises reacting an oxalic acid diester represented by the formula (1):wherein R1and R1′may be the same or different from each other, and each represent a hydrocarbon group,and an N-alkyl-O-alkylhydroxylamine represented by the formula (2):in-line-formulae description="In-line Formulae" end="lead"?R2O—NHR3  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein R2and R3have the same meanings as defined above,or an acid salt thereof in the presence of a base.

REFERENCES:
patent: 6265434 (2001-07-01), Caldwell et al.
patent: 2002-541104 (2002-12-01), None
patent: WO-00/59503 (2000-10-01), None
Edited by CSJ: The Chemical Society of Japan, “Shin Jikken Kagaku Kosa 14 Yuki Kagobutsu no Gosei to Han'no II”, Maruzen Co., Ltd., Dec. 20, 1977, pp. 1226-1229.

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