Foldamer-templated catalysis of macrocycle formation.
Foldamer-templated catalysis of macrocycle formation.
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DOI:
10.1126/science.aax7344
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发表时间:
2019-12-20
期刊:
影响因子:
--
通讯作者:
Gellman SH
中科院分区:
文献类型:
--
作者:
Girvin ZC;Andrews MK;Liu X;Gellman SH
Macrocycles, compounds containing a ring of 12 or more atoms, find use in human medicine, fragrances and biological ion sensing. The efficient preparation of macrocycles is a fundamental challenge in synthetic organic chemistry because the high entropic cost of large ring closure allows undesired intermolecular reactions to compete. Here we present a bio-inspired strategy for macrocycle formation via carbon-carbon bond formation. The process relies on a catalytic oligomer containing α- and β-amino acid residues to template the ring-closing process. The α/β-peptide foldamer adopts a helical conformation that displays a catalytic primary amine/secondary amine diad in a specific three-dimensional arrangement. This catalyst promotes aldol reactions that form rings containing 14-22 atoms. Utility is demonstrated in the synthesis of the natural product robustol. An enzyme-inspired foldamer catalyzes efficient formation of molecules containing 14- to 22-membered rings.
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