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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 45, Number 6
JKCSEZ 45(6)
December 20, 2001 

 
Title
O-Alkylation Using Ag2O; Synthesis of Novel 4-Alkyloxy-2-phenylcarboxamidyl-1-tosylpyrrolidines

산화은을 이용한 O-알킬화 반응; 새로운 4-알킬옥시-2페닐카복사미딜-1-토실피롤리딘 유도체의 합성
Author
Myung-Sook Park

박명숙
Keywords
Abstract
새로운 COZ-2저해제를 개발하기 위하여 4-hydroxy L-proline의 1-위치에 arylsulfonyl기 2-위치에 arylcarboxamidyl기, 그리고 4-위치의hydroxy에 alkyl기를 도입한 새로운 후보 화합물을 합성하였다. 4-Hydroxy L-proline 1을 출발 물질로 하여 N-tosylation으로 1-위치에 4-methylphenylsulfonyl기를 도입하였고 esterification으로 carboxylic acid를 protection하였다. 4-위치의 O-alkyl-(or aralkyl)ation을 위해서 촉매로 silver oxide를 사용하여 다양한 유도체 4b-d로 전환시키는 데 성공하였다. Carboxylic acid기의 deprotection을 위해서 간편한 base-hydrolysis의 과정을 거쳐 4-alkyloxy-1-tosyl L-prolines 5b-d를 얻었다. 최종 목적 화합물인 1,2,4-치환된 pyrrolidine derivatives, 4-alkyloxy-2-phenylcarboxamidyl-1-tosyl pyrrolidines 6a-d 4종은 DCC를 사용하여 3 및 5b-d와 aniline과의 축합 반응으로 합성하였다.

For the development of new COX-2 inhibitor, novel compound were synthesized through induction an arylsulfonyl group to 1-position, an arylcarboxamidyl group to 2-position and an alkyl group to 4-position of L-proline. We started from 4-hydroxy-L-proline, the 4-methylphenylsulfonyl of 1-position was introduced through N-tosylation and the carboxylic acid group was protected by esterification. We sucessfully converted to a various derivatives 4b-d for O-alkyl-(or aralkyl)ation of 4-position using silver oxide as catalysis. The 4-alkyloxy-1-tosyl L-prolines 5b-d were synthesized through base-hydrolysis for the deprotection of carboxylic acid. Final compound 1,2,4-substituted pyrrolidines, 4-alkyloxy-2-phenylcarboxamidyl-1-tosyl pyrrolidines 6a-d were synthesized through the condensation of arylamine with 3 and 5b-d using DCC.

Page
549 - 554
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