553-60-6Relevant academic research and scientific papers
N-alkylation of pyridylalanine and pyridinecarboxylic acids and their use in synthesis of GnRH antagonists
Zhang, Yongliang,Tian, Zhenping,Kowalczuk, Maria,Edwards, Patrick,Roeske, Roger W.
, p. 3659 - 3662 (1993)
A mild N-alkylation method has been developed for the synthesis of N-alkylated pyridiniumcarboxylic acids, using Ag2O-H2O catalysis to enhance the low-reactivity of pyridinecarboxylic acids. Two approaches were undertaken for the synthesis of a series of GnRH antagonists containing pyridinium moieties at the side chain: (1) incorporation of Npy-alkylated D-pyridylalanine during solid phase peptide chain assembly, and (2) coupling of the N-alkylated pyridinium-carboxylic acid to the resin-bound ε-amino group of a D-lysine on a solid support.
Carbon monoxide is used as a source of halogen compound heterogeneous palladium catalyst in the presence of the aldehyde carbonyl compound by reaction carbonylation method (by machine translation)
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Paragraph 0067; 0082; 0083; 0084, (2018/04/06)
[Problem] catalyst and the presence of carbon monoxide, the halogen compound is a carbonyl compound in the carbonylation reaction, catalysts or carbon monoxide source technique has problems. [Solution] the presence of the catalyst and the carbon monoxide, the halogen compound is carbonylation reaction method for producing a carbonyl compound, As a heterogeneous palladium catalyst, carbon monoxide is produced from an aldehyde carbonyl compound used in the method. [Drawing] no (by machine translation)
AMIDATION METHOD AND ESTERIFICATION METHOD USING SULFONIC ACID HALIDE
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Paragraph 0038, (2017/01/17)
PROBLEM TO BE SOLVED: To provide a safe and economical method for rapidly synthesizing amides and esters in high yield. SOLUTION: There is provided a method for amidating an amine or a derivative thereof using a sulfonic acid halide, where a sulfonic acid halide is allowed to act as an activator on a carboxylic acid or a derivative thereof to synthesize an active ester, and the active ester is reacted with an amine or a derivative thereof as a nucleophile to amidate the amine or the derivative thereof to obtain a corresponding amide or a derivative thereof. In a similar manner, a sulfonic acid halide is allowed to act as an activator on a carboxylic acid or a derivative thereof to synthesize an active ester, and the active ester is reacted with an alcohol or a derivative thereof as a nucleophile to esterify the alcohol or the derivative thereof to obtain a corresponding ester or a derivative thereof. SELECTED DRAWING: Figure 1 COPYRIGHT: (C)2016,JPO&INPIT
Iron(III) chloride-promoted direct conversion of aryl/alkyl cyanides to esters
Srinivasan,Rao, K. Srinivasa,Jayachitra,Ralte, Samuel L.
, p. 2883 - 2886 (2007/10/03)
Aryl/alkyl cyanides were quickly converted into the corresponding esters in the presence of iron(III) chloride in refluxing alcohols with very good yields. Copyright Taylor & Francis Group, LLC.
