Design and synthesis of a conformational analog of deoxybouvardin
摘要:
The design and synthesis of 9, an analogue of deoxybouvardin (2), is detailed. The substitution of the beta-lactam in 9 for the 14-membered N-methylcycloisodityrosine subunit of 2 serves to mimic the unusual beta-turn possessing a central cis amide bond found in the natural product and restricts and restricts the accessible conformations of the remaining tetrapeptide (D-Ala-Ala-N(Me)-Tyr(OMe)-Ala) to those including that found in the solution and X-ray conformation of the natural product.