The present invention provides a process for preparation of Vortioxetine hydrobromide (I). The present invention also relates to the novel intermediate and its use in preparation of vortioxetine hydrobromide (I).

##STR00001##

The present invention provides a process for preparation of Vortioxetine hydrobromide (I). The present invention also relates to the novel intermediate and its use in preparation of vortioxetine hydrobromide (I).

##STR00001##

The present invention relates to a novel method for preparing bis(3-aminophenyl) disulphides of the general formula (I) and 3-aminothiols of the general formula (II), ##STR00001##
where X, Y have the meanings stated in the description,
which serve as intermediates for the preparation of phenyl sulphoxides having insecticidal, acaricidal and nematicidal activity.

The present invention relates to a novel method for preparing bis(3-aminophenyl) disulphides of the general formula (I) and 3-aminothiols of the general formula (II), ##STR00001##
where X, Y have the meanings stated in the description,
which serve as intermediates for the preparation of phenyl sulphoxides having insecticidal, acaricidal and nematicidal activity.

The present invention relates to a novel method for preparing bis(3-aminophenyl) disulphides of the general formula (I) and 3-aminothiols of the general formula (II), ##STR00001##
where X, Y have the meanings stated in the description,
which serve as intermediates for the preparation of phenyl sulphoxides having insecticidal, acaricidal and nematicidal activity.

Provided are: A collector containing a compound that increases the recovery amount of a target mineral; a flotation method that uses this compound; and a compound that is suitable as a collector. This collector includes a compound represented by the following formula (1).

##STR00001##

(In formula (1), R.sup.1 represents an alkyl group having 1 or more and 18 or less carbon atoms, and X represents NR.sup.2R.sup.3, SR.sup.4, or OR.sup.5, and R.sup.2-3 each represents hydrogen or an alkyl group having 1 or more and 18 or less carbon atoms, and R.sup.4-5 each represent an alkyl group having 1 or more and 18 or less carbon atoms.

On use of a sulfonium salt of specific structure as PAG, acid diffusion is suppressed. A resist composition comprising the sulfonium salt forms a pattern with improved lithography properties including EL, MEF and LWR when processed by lithography.

On use of a sulfonium salt of specific structure as PAG, acid diffusion is suppressed. A resist composition comprising the sulfonium salt forms a pattern with improved lithography properties including EL, MEF and LWR when processed by lithography.

Provided are a diamine compound, a polyamic acid and polyimide using the same. The diamine monomer compound is useful for preparing a transparent polyamic acid and polyimide having a high refractive index and a low birefringence.

Provided are a diamine compound, a polyamic acid and polyimide using the same. The diamine monomer compound is useful for preparing a transparent polyamic acid and polyimide having a high refractive index and a low birefringence.