951173-22-1Relevant articles and documents
Prevalence of Eight-membered hydrogen-bonded rings in some bis(cyclobutane) β-dipeptides including residues with trans stereochemistry
Torres, Elisabeth,Gorrea, Esther,Da Silva, Eric,Nolis, Pau,Branchadell, Vicenc,Ortuno, Rosa M.
, p. 2301 - 2304 (2009)
Three new bis(cyclobutane) β-dipeptides have been synthesized from appropriate derivatives of cis- and trans-2-aminocyclobutane-1-carboxylic acid, respectively. The predominance of eight-membered hydrogen-bonded rings has been manifested for (trans,trans)- and (trans,cis)-β- dipeptides while the formation of six-membered rings is preferred for the (cis,trans)- β-dipeptide similarly to the previously described (cis,cis)-diastereomer.
A refined synthesis of enantiomerically pure 2-aminocyclobutanecarboxylic acids
Declerck, Valerie,Aitken, David J.
experimental part, p. 587 - 595 (2012/06/04)
The synthesis of enantiomerically pure 2-aminocyclobutanecarboxylic acids has been refined to improve both the efficiency and the simplicity. These improvements provide a shorter and easier access to the racemic cis-cyclobutane β-amino acid core. Derivatization of this material with a chiral non-racemic oxazolidin-2-one allows easy diastereoisomeric separation and presents the advantage of allowing the non-destructive cleavage of the chiral auxiliary either by hydrolysis or by ammonolysis, thus providing an efficacious access to N-protected derivatives of all four stereoisomers of Boc-2-aminocyclobutanecarboxylic acid.
PIPERIDINE DERIVATIVES AS MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY
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Page/Page column 119, (2009/03/07)
The present application describes modulators of MIP-1 of formula (I) : or stereoisomers or pharmaceutically acceptable salts thereof, wherein m, Q, T, W, Z, R1, R3, R4, R5, R5a and R5b, are as set forth above. In addition, methods of treating and preventing inflammatory diseases such as asthma and allergic diseases, as well as autoimmune pathologies such as rheumatoid arthritis and atherosclerosis using the modulators are disclosed.