Yamamoto Chemicals has been performing research and development for functional dyes involving in the communities by utilizing our “Technologies” we accumulated in our long history for about 90 years.

Our possessing reactions・technologies

Reactions using sulfuric acid

Dehydration condensation reaction	Triphenyl methane derivatives
	Anthraquinone derivatives
	Triphenylmethane derivatives

Reactions using aluminum chloride

Acylation reaction	Benzoyl derivatives
	Benzoyl keto derivatives

Reactions using acetic anhydride

Acetylation reaction	N-, C-Acetyl derivatives
Dehydration condensation reaction	Phthalide derivatives

Reactions using dialkyl sulfuric acid

Alkylation reaction	N-methyl derivatives
	N-ethyl derivatives

Reactions using alkyl halide

N-Alkylation reaction	N-alkyl derivatives
	N-dialkyl derivatives
O-Alkylation reaction	Alkoxy derivatives
Esterification reaction	Ester derivatives

Reactions using aryl halide

N-Arlylation reaction	N-aryl derivatives
	N-diaryl derivatives
	N-triaryl derivatives
O-Arylation reaction	Phenoxy derivatives

Reactions using sodium nitride

Diazotization reaction	Azo dyes
Tetrazotization reaction	Azo dyes

Reactions using chlorosulfonic acid

Chloro-sulfonation reaction	Sulfonyl derivatives
	Sulfonic acid derivatives

Carbon・carbon cross-coupling reaction

Bisaryl derivatives

Heterocyclization reaction

Indole derivatives
Iso-indole derivatives
Pyrrole derivatives
Barbituric acid derivatives
Phenothiazine derivatives

Vilsmeier Reaction

Fromylation reaction
Cyanidation reaction

Halogenation reaction

Bromination reaction
Chlorination reaction

Others

Phthalocyanine derivatives
Naphthalocyanine derivatives
Tetraazaporphyrin derivatives
Cyanine derivatives
Azo metal complex

For details information of Yamamoto Chemicals, Inc. as a research and
development-led manufacturer, please press this button.
(Research and development policy of Yamamoto Chemicals)