Ferrocenyl diphosphines R2PF-P(R′)2 are effective, tunable ligands for the iridium catalyzed enantioselectivehydrogenation of N-aryl imines in the presence of iodide and acid promoters. Structure–activity/selectivity correlations were found for the hydrogenation of N-(2-ethyl-6-methylphenyl)-N-(1′-methoxymethyl)-ethylidene-amine (MEA-imine) and for 2,3,3-trimethylindolenine (TMI). Extremely high catalytic
The invention relates to a method for the preparation of preparing N-(l-methoxyprop-2-yl)-2,4- dimethyl-3-aminothiophene or salts thereof comprising contacting 2,4-dimethyl-2,3- dihydrothiophen-3-one with 2-methoxyisopropylamine, in the presence of one or more compounds selected from the group consisting of an acid salt of 2-methoxyisopropylamine, a Lewis acid, triflic acid, gaseous hydrochloric acid and a mixture of hydrochloric acid with a C1- C6-alkylalcohol.