114396-70-2Relevant articles and documents
Total synthesis and structure elucidation of JBIR-39: A linear hexapeptide possessing piperazic acid and γ-hydroxypiperazic acid residues
Yoshida, Masahito,Sekioka, Naoki,Izumikawa, Miho,Kozone, Ikuko,Takagi, Motoki,Shin-ya, Kazuo,Doi, Takayuki
supporting information, p. 3031 - 3041 (2015/02/05)
The total synthesis and stereochemical structural elucidation of JBIR-39, containing four nonproteinogenic piperazic acid (Piz) residues, is reported. The synthesis includes Sc(OTf)3-catalyzed acylation of a Piz(γ-OTBS) derivative with piperazi
ORALLY AVAILABLE SPHINGOSINE 1-PHOSPHATE RECEPTOR AGONISTS AND ANTAGONISTS
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Page/Page column 138-140, (2008/06/13)
The present invention relates to S1P analogs that have activity as S1Preceptor modulating agents and the use of such compounds to treat diseases associated with inappropriate S1P receptor activity. The compounds have the general structure (I) wherein R11 is C5-C18 alkyl or C5-C18 alkenyl; Q is selected from the group consisting of C3-C6 optionally substituted cycloalkyl, C3-C6 optionally substituted heterocyclic, C3-C6 optionally substituted aryl C3-C6 optionally substituted heteroaryl and; R2 is selected from the group consisting of H, C1-C4 alkyl, (C1-C4 alkyl)OH and (C1-C4 alkyl)NH2; R23 is H or C1-C4 alkyl, and R15 is a phosphonate ester or a phosphate ester or a pharmaceutically acceptable salt or tautomer thereof.
New enantiodivergent procedure for the syntheses of chiral α- substituted serines from α-alkyl-α-aminomalonates utilizing enzymatic hydrolysis
Sano, Shigeki,Hayashi, Kazuhiko,Miwa, Toshio,Ishii, Takahiro,Fujii, Michiho,Mima, Hiromi,Nagao, Yoshimitsu
, p. 5571 - 5574 (2007/10/03)
Porcine liver esterase (PLE)- or rabbit liver esterase (RLE)-catalyzed hydrolysis of the pro-S ester group of diethyl α-alkyl-α- (benzyloxycarbonylamino)malonates 2a-c afforded (R)-ethyl α-alkyl-α- (benzyloxycarbonylamino)malonates 3a-c each in excellent enantiomeric excess. Enantiodivergent reductions of these acid esters 3a-c readily furnished both the corresponding enantiomeric α-substituted serines (R)- and (S)-5a-c.