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Absolute configuration and structure of ethyl 2-(3-methyl-1,4-dioxoperhydrocyclopenta[4,5]pyrrolo[1,2-a]pyrazin-2-yl)-4-phenylbutyrate

✍ Scribed by Paulus, E. F. ;Geiger, R. ;Henning, R. ;Teetz, V. ;Urbach, H.

Book ID
114504902
Publisher
International Union of Crystallography
Year
1987
Tongue
English
Weight
430 KB
Volume
43
Category
Article
ISSN
0108-2701

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## Abstract Previously synthesized 2‐(3′‐chloro‐5′,6′‐dicyanopyrazin‐2′‐yl)cyclopentan‐1‐one **1**, obtained from the reaction of 2,3‐dichloro‐5,6‐dicyanopyrazine with 1‐pyrrolidino‐1‐cyclopentene, was further reacted with primary alkylamines to give mixtures of diastereomer of 5‐alkyl‐2,3‐dicyano‐