42538-31-8Relevant articles and documents
Versatile synthesis of the signaling peptide glorin
Barnett, Robert,Raszkowski, Daniel,Winckler, Thomas,Stallforth, Pierre
supporting information, p. 247 - 250 (2017/03/14)
We present a versatile synthesis of the eukaryotic signaling peptide glorin as well as glorinamide, a synthetic analog. The ability of these compounds to activate glorin-induced genes in the social amoeba Polysphondylium pallidum was evaluated by quantita
Development of a large-scale synthesis of sulphostin, a dipeptidyl peptidase IV inhibitor
Abe, Masatoshi,Nagai, Masashi,Yamamoto, Keiichiro,Yamazaki, Hiroko,Koga, Ichiro,Satoh, Yoshitaka,Muraoka, Yasuhiko,Kurashige, Shuji,Ichikawa, Yuh-Ichiro
, p. 570 - 576 (2012/12/25)
For the progress of the in vivo study on sulphostin, a dipeptidyl peptidase IV inhibitor, its large-scale synthetic method was investigated. The optical resolution of (3S,RSP)-1-amino(sulfoamino)phosphinyl-3- benzyloxycarbonylamino-2-piperidinone, which was the most difficult step in the previous method, was simplified by using fractional crystallization. The use of 2 mol equiv of (1S,2R)-(+)-2-amino-1,2-diphenylethanol for optical resolution gave desired diastereomer 15 in good yield as a less soluble salt. In the present synthetic method, there were no requirements for purification using column chromatography, reaction at cryogenic temperature, and treatment using the haloalkane solvents. The total yield of the new method was 4.6%, which was an improvement of approximately 2-fold compared to the method reported previously.
Three-step synthesis of (R)- and (S)-Thalidomides from ornithine
Suzuki, Emiko,Shibata, Norio
, p. 275 - 279 (2007/10/03)
Three-step synthesis of enantiomerically pure thalidomide is described. D-Ornithine (2) reacted with thionyl chloride in methanol followed by treatment with triethylamine to give the (R)-3-amino-piperidin-2-one hydrochloride (3) in good yield. Protection of amino moiety by the use of N-carboethoxyphtalimide in DMSO furnished (R)-N-phtaloylpiperidin-2-one (4) as colorless crystals. Finally, the oxidation using a catalytic amount of RuO2 in the presence of excess sodium metaperiodate in a two-phase system gave (R)-thalidomide (1) in good yield without racemization. (S)-Thalidomide (1) was also synthesized from L-ornithine (2) in good overall yield. Since all the intermediates to thalidomide are easily recrystallized, the present method can be performed on a large scale without purification by column chromatography.