Method for producing organic silicon compound having ketimine structure
An organic silicon compound having a ketimine structure can be recovered at a high yield through a method for producing an organic silicon compound having a ketimine structure represented by formula (1), the method having a step for reacting an amino-group-containing organic silicon compound represented by formula (2) and a carbonyl compound represented by formula (3) in the presence of an inorganic adsorbent. (In the formulas, R 1 each independently represent a C1-10 alkyl group or a C6-10 aryl group, R 2 each independently represent a C1-10 alkyl group or a C6-10 aryl group, R 3 and R 4 each independently represent a hydrogen atom, a C1-10 alkyl group, or a C6-10 aryl group, n represents an integer of 1-3, and m represents an integer of 1-12.) (In the formulas, R 1 -R 4 , n, and m are the same as above.)
1 . A method for preparing an organosilicon compound having a ketimine structure, represented by the formula (1):
wherein R 1 is each independently a C 1 -C 10 alkyl group or C 6 -C 10 aryl group,
R 2 is each independently a C 1 -C 10 alkyl group or C 6 -C 10 aryl group,
R 3 and R 4 are each independently hydrogen, a C 1 -C 10 alkyl group or C 6 -C 10 aryl group,
n is an integer of 1 to 3, and m is an integer of 1 to 12,
the method comprising the step of reacting an amino-containing organosilicon compound having the formula (2) with a carbonyl compound having the formula (3) in the presence of an inorganic adsorbent,
wherein R 1 , R 2 , R 3 , R 4 , n, and m are as defined above, and
wherein the inorganic adsorbent is at least one member selected from the group consisting of aluminum hydroxide, hydrotalcite, magnesium silicate, aluminum silicate, and aluminum oxide/magnesium oxide solid solution.
2 . The method of claim 1 , further comprising the step of taking out the organosilicon compound having formula (1) by distillation purification.
3 . The method of claim 1 wherein the inorganic adsorbent is synthetic hydrotalcite.
4 . The method of claim 1 wherein R 1 is methyl or ethyl, R 3 is isobutyl, R 4 is methyl, both m and n are 3.