Use of the Potassium Ion as a Template for the Selective Derivatization of the Antibiotic X-206
摘要:
The templating effect of potassium ions on the ionophore antibiotic X-206 (1) ensured that most of the hydroxy, hemiacetal, and ether groups were involved in encapsulation of the metal atom, which allowed a selective derivatization at the unbound C(22) position. The mechanism of acylation at, C(22) was investigated and the aquired knowledge used to achieve selective reactions on the benzyl ester 8 using a similar metal template protection.
Use of the Potassium Ion as a Template for the Selective Derivatization of the Antibiotic X-206
摘要:
The templating effect of potassium ions on the ionophore antibiotic X-206 (1) ensured that most of the hydroxy, hemiacetal, and ether groups were involved in encapsulation of the metal atom, which allowed a selective derivatization at the unbound C(22) position. The mechanism of acylation at, C(22) was investigated and the aquired knowledge used to achieve selective reactions on the benzyl ester 8 using a similar metal template protection.