51220-50-9Relevant academic research and scientific papers
TRIAZOLE DERIVATIVE
-
Page/Page column 21-22, (2008/06/13)
A compound represented by the formula (I) below or a pharmaceutically acceptable salt thereof has an effect of inhibiting binding between S1P and its receptor Edg-1(S1P1), and is useful as a pharmaceutical product. (I) (In the formula, A represents a sulfur atom, an oxygen atom, a formula -SO- or a formula -SO2-; R1 represents a hydrogen atom, an alkyl group having 1-6 carbon atoms or the like; R2 represents an alkyl group having 1-6 carbon atoms, a cycloalkyl group having 3-8 carbon atoms or the like; R3 represents a hydrogen atom or an alkyl group having 1-6 carbon atoms; R4 represents a hydrogen atom, an alkyl group having 1-6 carbon atoms, a phenyl group or the like; R5 represents a hydrogen atom or an alkyl group having 1-6 carbon atoms; and R6 represents an alkyl group having 1-6 carbon atoms, a phenyl group or a substituted phenyl group.)
Squaric acid derivatives prevent the removal of N-Cbz and N-Fmoc groups under catalytic hydrogenation reaction
Shinada,Hayashi,Yoshida,Ohfune
, p. 1506 - 1508 (2007/10/03)
Under the catalytic hydrogenation conditions (H2/Pd-C), squaric acid derivatives 4 and 7 were found to be effective additives for chemoselective reduction of olefins and an alkyne having an N-Cbz or N-Fmoc group where the amino group remained to be protected. Benzyl esters having an N-Cbz or N-Fmoc group we re also selectively removed to give the corresponding N-protected carboxylic acids.
A Facile Synthesis of α-Amino Esters via Reduction of α-Nitro Esters Using Ammonium Formate as a Catalytic Hydrogen Transfer Agent
Ram, Siya,Ehrenkaufer, Richard E.
, p. 133 - 135 (2007/10/02)
Various nitroesters 3 were selectively and rapidly reduced to their corresponding amino esters 4 in very good yield using anhydrous ammonium formate as a catalytic hydrogen transfer agent.
