C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 9/24 (2006.01)
Patent
CA 2280381
The present invention relates to an improved process for the preparation of an acyl derivative of O,S-dialkyl phosphoroamidothioate by reacting an O,S-dialkyl phosphoroamidothioate with an acylating agent in the presence of an acid, wherein the improvement resides in adding a C4 to C8 aliphatic alcohol, following completion of the acylation reaction, to the mixture of the O,S-dialkyl phosphoroamidothioate, the acylating agent and the acid. In an embodiment of the present invention, the acylation reaction is conducted in the absence of a solvent. The aliphatic alcohol is easily recovered and can be reused in a subsequent acylation reaction.
Desai Vijay C.
Erdman David T.
Jelich Klaus
Newallis Peter E.
Corporation Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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