Method for producing carbamate compound, carbamate compound, and method for producing isocyanate compound using same

1. A method of producing a carbamate compound, comprising reacting a fluorine-containing carbonic diester compound represented by formula (1) and a non-aromatic diamine compound represented by formula (2) without using a catalyst, to thereby produce a carbamate compound represented by formula (3):

(wherein, R represents a fluorine-containing monovalent aliphatic hydrocarbon group);

[Chem. 2]

H 2 N-A-NH 2   (2)

(wherein, A represents a divalent aliphatic hydrocarbon group, a divalent alicyclic hydrocarbon group or a divalent aromatic-aliphatic hydrocarbon group); and

(wherein, R represents a fluorine-containing monovalent aliphatic hydrocarbon group, and A represents a divalent aliphatic hydrocarbon group, a divalent alicyclic hydrocarbon group or a divalent aromatic-aliphatic hydrocarbon group).

2. The method of producing a carbamate compound according to claim 1 , wherein R of formula (1) has no fluorine atom on the α-position carbon atom bonded to the oxygen atom of the carbonate bond, and has two or more groups, in total, of at least one member selected from the group consisting of a fluorine atom, a polyfluoroalkyl group and a perfluoroalkyl group bonded to the adjacent β-position carbon atom.

3. The method of producing a carbamate compound according to claim 1 , wherein R of formula (1) is any of:

2,2,3,3-tetrafluoro-n-propyl group,

2,2,3,3,3-pentafluoro-n-propyl group,

1,1,1,3,3,3-hexafluoro-i-propyl group,

2,2,3,3,3,4,4,5,5-octafluoro-n-pentyl group,

2,2,3,4,4,4-hexafluoro-n-butyl group, or

2,2,2-trifluoroethyl group.

4. The method of producing a carbamate compound according to claim 1 , wherein the non-aromatic diamine compound represented by formula (2) is any of:

1,6-hexamethylenediamine,

isophoronediamine,

1,3-bis(aminomethyl)cyclohexane,

1,4-bis(aminomethyl)cyclohexane,

4,4′-diamino(dicyclohexylmethane),

2,5-bis(aminomethyl)bicyclo[2,2,1]heptane,

2,6-bis(aminomethyl)bicyclo[2,2,1]heptane,

1,3-bis(aminomethyl)benzene, or

1,4-bis(aminomethyl)benzene.

5. A method of producing an isocyanate compound, which comprises:

a step of producing a carbamate compound represented by formula (3), by the method of producing a carbamate compound of claim 1 ; and

a step of producing an isocyanate compound represented by formula (20) from the obtained carbamate compound without using a catalyst:

[Chem. 20]

O═C═N-A-N═C═O  (20)

(wherein, A represents a divalent aliphatic hydrocarbon group, a divalent alicyclic hydrocarbon group or a divalent aromatic-aliphatic hydrocarbon group).