Stephens TC, Lawer A, French T, Unsworth WP. Iterative Assembly of Macrocyclic Lactones using Successive Ring Expansion Reactions.
Chemistry 2018;
24:13947-13953. [PMID:
30011360 PMCID:
PMC6334170 DOI:
10.1002/chem.201803064]
[Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/12/2018] [Indexed: 12/27/2022]
Abstract
Macrocyclic lactones can be prepared from lactams and hydroxyacid derivatives via an efficient 3- or 4-atom iterative ring expansion protocol. The products can also be expanded using amino acid-based linear fragments, meaning that macrocycles with precise sequences of hydroxy- and amino acids can be assembled in high yields by "growing" them from smaller rings, using a simple procedure in which high dilution is not required. The method should significantly expedite the practical synthesis of diverse nitrogen containing macrolide frameworks.
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