Results 161 to 170 of about 19,944 (197)

Syntheses of Picroroccelin Diastereomers and Their Regioisomers

Chemistry Letters, 1986
Abstract Picroroccelin, 3,6-dibenzyl-3-hydroxy-6-methoxy-1-methyl-2,5-piperazinedione, and its regioisomer were synthesized as the diastereomeric mixtures from glycine anhydride via 3,6-dibenzylidene-1-methyl-2,5-piperazinedione by eight steps.
Chung-gi Shin, Toshitaka Nakano, Yoshiaki Sato, Haruo Kato   +3 more
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The natural occurrence of magnosalicin diastereomers

Phytochemistry, 1997
Aniba puchury-minor contains besides common mono- and chiefly sesquiterpenes, asaraldehyde and a series of monomeric arylpropanoids including E-asarone, magnosalicin and two of its diastereomers. © 1997 Elsevier Science Ltd.
Maria De Fátima Da Silva, Francisca S.N. Taveira, José Guiliierme Soares Maia, Lucia M. Conserva, Massayoshi Yoshida, Otto R. Gottlieb   +5 more
openaire   +1 more source

Separation of diastereomers of methylphosphonate dinucleotides

Tetrahedron Letters, 1986
Abstract A chiral derivatizing agent, 1-menthyl chloroformate, has been used as a 3′-OH blocking group to facilitate the resolution of diastereomers of methylphosphonate dinucleotides by silica gel column chromatography.
S.B. Katti, Kan Agarwal
openaire   +1 more source

Preparation of Dolutegravir Intermediate Diastereomer

Journal of Heterocyclic Chemistry, 2019
A convenient method was developed to prepare the diastereomer of dolutegravir tricyclic intermediate in the catalysis of EDCI/DMAP in up to 87% yield. Different solvents, temperature, and times were optimized. The synthesized diastereomer 6′ could be used as a standard for the industrial manufacture requirement of dolutegravir active pharmaceutical ...
Xianheng Wang, Song Chen, Changkuo Zhao, Liangye Long, Yuhe Wang   +4 more
openaire   +1 more source

Direct Crystallization of Enantiomers and Dissociable Diastereomers

2011
Molecules whose mirror images cannot be superimposed on each other are identified as being chiral, and a very important branch of separation science has developed around the resolution of compounds having pharmaceutical interest. At one time, scientists associated the phenomenon of optical rotation with the presence of carbon atoms bound to four ...
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Stereochemistry of Methadol Diastereomers

Journal of Pharmaceutical Sciences, 1966
P S, Portoghese, D A, Williams
openaire   +2 more sources

Crystallization-Induced Diastereomer Transformations

Chemical Reviews, 2006
Karel M J, Brands, Antony J, Davies
openaire   +2 more sources

Conformational preferences in diastereomers. IV. 1,2,3-Diastereomers

The Journal of Organic Chemistry, 1968
D. C. Best, Charles A. Kingsbury
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Correction. Conformational Preferences in Diastereomers. IV. 1,2,3 Diastereomers

The Journal of Organic Chemistry, 1969
D Best, C Kingsbury
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Diastereomers

2011
openaire   +2 more sources