104612-35-3Relevant articles and documents
Preparation method of 1-methyl-3-pyrrolidinol
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Paragraph 0051; 0056-0058; 0064; 0069-0071; 0077; 0082;..., (2021/09/01)
The invention relates to the technical field of synthesis of medical intermediates, and particularly discloses a preparation method of 1-methyl-3-pyrrolidinol. The preparation method comprises the following steps that S1, a compound I and a compound II are subjected to a ring closing reaction, so a compound III is obtained; and S2, the compound III obtained in the step S1 and a reducing agent IV are subjected to a reduction reaction, so 1-methyl-3-pyrrolidinol is obtained, wherein the compound I, the compound II and the compound III are as shown in the specification; and the reducing agent IV is one or more selected from a group consisting of sodium borohydride, potassium borohydride, boron trifluoride-diethyl ether and boron tribromide-diethyl ether. According to the preparation method, the compound II and the compound I are selected and subjected to the ring closing reaction to obtain the intermediate compound III, and the compound III is solid and is easy to crystallize and purify, so the purification difficulty of the intermediate is reduced, the purity of the intermediate is favorably improved, and the product quality of the 1-methyl-3-pyrrolidinol is further improved.
SYNTHESIS OF AN ANTIVIRAL COMPOUND
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Paragraph 0137, (2014/03/22)
The present disclosure provides a processes for the preparation of a compound of Formula I: which is useful as an antiviral agent. The disclosure also provides compounds that are synthetic intermediates to compounds of Formula I.
An easy access to protected (4S, 5R)-5-alkyl-4-hydroxy-2-pyrrolidinones and their use as versatile synthetic intermediates
Huang, Pei Qiang,Wang, Shi Li,Ye, Jian Liang,Ruan, Yuan Ping,Huang, You Qing,Zheng, Hong,Gao, Jing Xing
, p. 12547 - 12560 (2007/10/03)
A versatile approach to enantiopure (4S, 5R)-5-alkyl-4-hydroxy-2- pyrrolidinones is described. The key steps involve a regioselective Grignard reagent addition to (S)-malimides, and diastereoselective reductive dehydroxylation of the resulting hemi-azaketals. The flexibility of this methodology has been demonstrated by the synthesis of (2R, 3R)-3-amino-1- benzyl-2-methylpyrrolidine, the parent diamine of antipsychotic agent, emonapride, and the unnatural enantiomer of the β-hydroxy-γ-amino acid residue of hapalosin in lactam form.