| 主权项 |
1. A process for the preparation of teneligliptin, a compound of formula I or salt or hydrate thereof, the process comprising: (a)(i) reacting a compound of formula 11, with bis(2-chloroethyl) amine or N-protected derivative or salt thereof to obtain as compound of formula. Int-B or an N-protected derivative or salt thereof, Or (a)(ii) reacting 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-carbaldehyde, compound of formula 30 with piperazine or N-protected derivative thereof.to obtain a compound of formula Int-B or an N-protected derivative or salt thereof; (b) reacting the compound of formula Int-B or N-protected derivative or salt thereof with a compound of formula 13 to obtain a compound of formula 14,wherein R is an amino protecting group selected, from the group consisting of aralkyl, acyl, lower alkoxycarbonyl, aralkyloxycarbonyl lower alkanesulfonyl, aryl sulfonyl, tri-(loweralkyl)silyl and triphosgene; and
(c) deprotecting the compound of formula 14 to obtain teneligliptin, compound of formula I or salt or hydrate thereof. |
