80213-00-9Relevant academic research and scientific papers
Lipase-catalyzed practical synthesis of (R)-1-benzyl-3-hydroxy-2,5-pyrrolidinedione and its related compounds
Tomori, Hiroshi,Shibutani, Kuniko,Ogura, Katsuyuki
, p. 207 - 215 (2007/10/03)
A practical method for preparing (R)-1-benzyl-3-hydroxy-2,5-pyrrolidinedione (1) was investigated by the use of the enzymatic hydrolysis of its acetate (2a). Among several hydrolases examined here, lipase PS from Pseudomonas cepacia gave the best result: In a mixed solvent (1:1 v/v) of dioxane and a phosphate buffer (pH 7), the hydrolysis took place smoothly with a high enantioselectivity (E > 3000). Several 3-alkanoyl derivatives of 1 were subjected to the lipase PS-catalyzed hydrolysis. The chain length of the alkanoyl does not noticeably influence the reaction rate or the enantioselectivity. In contrast, the hydrolysis of the 1-benzoyl derivative proceeded slowly with a low enantioselectivity (E = 19). The syntheses of optically active 3-hydroxypyrrolidines and 3-hydroxypiperidines were also achieved under the reaction conditions similar to the lipase PS-catalyzed hydrolysis of 2a.
Process for the preparation of 3-pyrrolidinols and intermediates therefor
-
, (2008/06/13)
3-Pyrrolidinol or its salt is economically produced by cyclizing an aminobutanol derivative of the formula: STR1 wherein R is an alkyl or a substituted or unsubstituted phenyl group, or its salt.
