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(R)‐3‐aminopiperidine ((R)‐APD), a key intermediate for alogliptin, trelagliptin, and linagliptin, was successfully resolved from racemic 3‐aminopiperidine with an enantiomerically pure resolving agent, namely, (R)‐4‐(2‐chlohydroxy‐1.3.2‐dioxaphosphorinane 2‐oxide ((R)‐CPA), via diastereomeric salt formation. By this resolution approach, (R)‐3‐aminopiperidine was obtained in 99.5% yield with 99.6%...
A novel low-molecular-weight polysaccharide (CMP-1) with antioxidant, immunostimulatory and antitumor activities was isolated from the cultured Cordyceps militaris. The structure of CMP-1 was elucidated by a combination of physicochemical and instrumental analyses, and its average molecular weight was 4.3kDa. The backbone of CMP-1 was composed of (1→4)-linked α-d-glucopyranosyl, (1→6)-linked β-d-glucopyranosyl...
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