Preparation of 2-alkyl-3-aminothiophene derivative

The present invention provides a hydride reducing process sulfur-containing compounds using a noble metal catalyst. Further, the present invention provides a high process industrial process economical for producing reduced to 2-alkyl-3-aminothiophene derivative hydrogenation of 2-alkenyl-3-thiophene derivative using a noble metal catalyst. 2-alkyl-3-aminothiophene derivatives are useful Nakago Animal Crossing in the pharmaceutical agriculture, particularly agricultural and horticultural fungicides, or are useful as intermediates. For example, the 2-alkenyl-3-thiophene derivatives In the production of 2-alkyl-3-aminothiophene derivative by reducing hydrogenated using a noble metal catalyst, used by the reaction temperature and 0.99 ° C. to 300 ° C. already a precious metal catalyst is recovered it is possible to re-use of. Thus, the present invention is by reducing hydrogenating sulfur-containing compound at a reaction temperature of using a noble metal catalyst 0.99 ° C. to 300 ° C., it is useful as an industrial hydrogenation reduction method because a noble metal catalyst can be recovered reused .