2-Phenethyl-L-proline hydrochloride
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2-Phenethyl-L-proline hydrochloride

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Category
Cyclic Amino Acids
Catalog number
BAT-006762
CAS number
1049741-77-6
Molecular Formula
C13H18ClNO2
Molecular Weight
255.74
2-Phenethyl-L-proline hydrochloride
IUPAC Name
(2S)-2-(2-phenylethyl)pyrrolidine-2-carboxylic acid;hydrochloride
Synonyms
H-(PhEt)Pro-OH HCl; (S)-α-Phenethyl-proline HCl; (S)-2-Phenethylpyrrolidine-2-carboxylic acid hydrochloride
Related CAS
1048029-23-7 (free base)
Purity
95%
Storage
Store at 2-8 °C
InChI
InChI=1S/C13H17NO2.ClH/c15-12(16)13(8-4-10-14-13)9-7-11-5-2-1-3-6-11;/h1-3,5-6,14H,4,7-10H2,(H,15,16);1H/t13-;/m1./s1
InChI Key
NZORNSLALKFTJI-BTQNPOSSSA-N
Canonical SMILES
C1CC(NC1)(CCC2=CC=CC=C2)C(=O)O.Cl
1. Metal-free and regiospecific synthesis of 3-arylindoles
Chuangchuang Xu, Wenlai Xie, Jiaxi Xu Org Biomol Chem. 2020 Apr 8;18(14):2661-2671. doi: 10.1039/d0ob00317d.
A convenient, metal-free, and organic acid-base promoted synthetic method to prepare 3-arylindoles from 3-aryloxirane-2-carbonitriles and arylhydrazine hydrochlorides has been developed. In the reaction, the organic acid catalyzes a tandem nucleophilic ring-opening reaction of aryloxiranecarbonitriles and arylhydrazine hydrochlorides and Fischer indolization. The organic base triethylamine plays a crucial role in the final elimination step in the Fischer indole synthesis, affording 3-arylindoles regiospecifically. The reaction features advantages of microwave acceleration, non-metal participation, short reaction time, organic acid-base co-catalysis, and broad substrate scope.
2. Mixed Macrocycles Derived from 2,6-Diformylpyridine and Opposite Enantiomers of trans-1,2-Diaminocyclopentane and trans-1,2-Diaminocyclohexane
Rafał Frydrych, Katarzyna Ślepokura, Andrzej Bil, Janusz Gregoliński J Org Chem. 2019 May 3;84(9):5695-5711. doi: 10.1021/acs.joc.9b00614. Epub 2019 Apr 22.
The condensation reaction of 2,6-diformylpyridine with an equimolar mixture of opposite enantiomers of trans-1,2-diaminocyclopentane and trans-1,2-diaminocyclohexane using a dynamic combinatorial chemistry approach has been examined. In nonmetal-templated reactions, depending on reaction conditions, mixed 2 + 1 + 1 macrocyclic imine or bigger mixed 4 + 2 + 2 imine macrocycle are formed selectively. The 2 + 1 + 1 imine used as a precursor in the templated by CdII ions produces a library of enlarged chiral mixed imines coordinated with metal cations among which the hexanuclear CdII complex of 6 + 3 + 3 imine was isolated and characterized. All macrocyclic imine compounds have been reduced to the corresponding macrocyclic amines, which have been further transformed into their hydrochlorides. Each macrocyclic compound has been obtained as two enantiomers. For imine macrocycles and for the hydrochloride derivatives of macrocyclic amines, their X-ray crystal structures have been determined. In particular, the crystals of protonated 4 + 2 + 2 macrocyclic amine, which contains two types of diastereomeric cations differing in terms of inverted twists of pyridine moieties, and hexanuclear CdII complex of 6 + 3 + 3 imine, which gives a deeper insight into the expansion reaction, have been investigated. A heterochiral self-sorting of 2 + 2 and 2 + 1 + 1 macrocyclic imines has been confirmed by a competition reaction of 2,6-diformylpyridine, racemic trans-1,2-diaminocyclopentane, and racemic trans-1,2-diaminocyclohexane and theoretical calculations.
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