β-Loop, γ-Loop, and helical peptide conf
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Dieter Albert; Martin Feigel
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Article
📅
1997
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John Wiley and Sons
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German
## Abstract The steroidal pseudo‐amino acids 3ã‐amino‐5β‐cholan‐24‐oic acid (2a), 12ã‐acetoxy‐3ã‐ammonia‐5β‐cholan‐24‐oic acid (2b), and 7ã,12ã‐diacetoxy‐3ã‐amino‐5β‐cholan‐24‐oic acid (2c) are used as rigid spacers in the backbone of the cyclic peptides cyclo(–2a–Phe‐Phe–)~2~ (1a), cyclo(–2b–Phe‐P