Method for preparing glufosinate or analogues thereof

A method for preparing a glufosinate of formula (I) or an analogue thereof,

• which method comprises:
• a) feeding a compound of formula (II) and a compound of formula (V) into a first reactor set, wherein after reaction, a product stream of the first reactor set is obtained,
• b) feeding the product stream of the first reactor set into a second reactor set, and reacting the product stream at a temperature in the range of from 50° C. to 200° C. to obtain a product stream of the second reactor set;
• and
• c) subjecting the product stream of the second reactor set to an acidic hydrolysis or a basic hydrolysis to obtain the glufosinate of formula (I) or an analogue thereof;
• wherein X represents —OR2 or —NR2R′,
• R1, R2 and R7 are each independently selected from a substituted or unsubstituted hydrocarbyl group;
• R′ is hydrogen or has the same definition as R2;
• Hal1 and Hal2 are each independently halogen;
• and
• PG is hydrogen or an amino protecting group;
• and
• wherein the feeding in the step a) and/or step b) is/are a continuous feeding.