15166-68-4Relevant academic research and scientific papers
Synthesis of γ-Lactams by Mild, o-Benzoquinone-Induced Oxidation of Pyrrolidines Containing Oxidation-Sensitive Functional Groups
Rong, Hao-Jie,Cheng, Yong-Feng,Liu, Fan-Fan,Ren, Shu-Jian,Qu, Jin
, p. 532 - 540 (2017/04/26)
The late-stage oxidation of substituted pyrrolidines offers good flexibility for the construction of γ-lactam libraries, and especially in recent years the methods for functionalization of pyrrolidine have been available. We reported a new strategy for oxidation of pyrrolidines to γ-lactams: reaction of pyrrolidine with an o-benzoquinone gives an N,O-acetal by direct oxidation of the α-C-H bond of the pyrrolidine ring, and then the N,O-acetal is further oxidized by the o-benzoquinone to the γ-lactam. Because the first oxidation occurs selectively at the α-C-H of the pyrrolidine ring, oxidation-sensitive functional groups (allyl-, vinyl-, hydroxyl-, and amino groups) on pyrrolidine ring are unaffected. The synthetic utility of this novel method was demonstrated by the facile syntheses of (S)-vigabatrin and two analogues.
Absorption medium and method for removing sour gases from fluid streams, in particular from flue gases
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, (2012/12/13)
Absorption medium for acid gases comprising an oligoamine (A) of the general formula (I) and a primary or secondary alkanolamine (B) of the general formula (II) in which the weight ratio of oligoamine (A) to the primary or secondary alkanolamine (B) is 0.2 to 4, and also the process for removing acid gases from a gas stream by contacting the gas stream at a pressure of 0.05 to 10 MPa abs with an aqueous solution brought to and maintained at a temperature of 20 to 80° C. of said absorption medium.
Chemoenzymatic enantioselective synthesis of 3-hydroxy-2-pyrrolidinones and 3-hydroxy-2-piperidinones
Kamal, Ahmed,Ramana, K. Venkata,Ramana, A. Venkata,Babu, A. Hari
, p. 2587 - 2594 (2007/10/03)
The enantioselective synthesis of 3-hydroxypyrrolidin-2-ones and 3-hydroxy piperidin-2-ones has been carried out in high enantiomeric excess employing immobilized lipase from Pseudomonas cepacia.
