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Studies on pyrrolidinones. Synthesis of 2-(5-oxo-2-pyrrolidinyl)-1,3,4-oxadiazoles and 2-(5-oxo-2-pyrrolidinyl)benzimidazoles

✍ Scribed by Pascal Cauliez; Daniel Couturier; Benoît Rigo; Dominique Fasseur; Patrice Halama

Book ID
112130698
Publisher
Journal of Heterocyclic Chemistry
Year
1993
Tongue
English
Weight
458 KB
Volume
30
Category
Article
ISSN
0022-152X

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Asymmetric Syntheses of α-Aminophosphoni
Asymmetric Syntheses of α-Aminophosphonic Acids, V. Synthesis of Enantiomerically Pure Diethyl 2-Pyrrolidinyl- and 5-Oxo-2-pyrrolidinylphosphonates
✍ Groth, Ulrich ;Richter, Lutz ;Schöllkopf, Ulrich 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 791 KB

## Abstract Enantiomerically pure 3‐ and 4‐substituted phosphonic acid derivatives 5 of pyroglutamic acid were prepared by a Michael addition of the lithiated (+)‐camphor derivative 2 to α,β‐unsaturated esters and subsequent hydrolysis. The reduction of the lactams 5 with LiBH~4~/BF~3~ · OEt~2~ aff