| 摘要 |
A process for preparing a compound represented by the following general formula (I) or a salt thereof, which comprises reacting lysine or a protective product thereof or a salt thereof with allysine or a protective product thereof in the presence of a specific trifluoromethane sulfonate to obtain a compound having pyridine ring or a salt thereof.
(wherein, in the above-described general formula (I), one of R 1 and R 2 is -CH 2 CH 2 CH 2 CH(NH 2 )COOH group, and the other is hydrogen atom. And wherein, in the above-described general formula (I), one, or two or more of hydrogen atom, one, or two or more of carbon atom, or one, or two or more of nitrogen atom may be substituted with their isotope.) |
