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- W3097584206 abstract "Abstract Pnictogen‐bonding catalysis and supramolecular σ‐hole catalysis in general is currently being introduced as the non‐covalent counterpart of covalent Lewis acid catalysis. With access to anti‐Baldwin cyclizations identified as unique characteristic, pnictogen‐bonding catalysis appeared promising to elucidate one of the hidden enigmas of brevetoxin‐type epoxide opening polyether cascade cyclizations, that is the cyclization of certain trans epoxides into cis‐fused rings. In principle, a shift from S N 2‐ to S N 1‐type mechanisms could suffice to rationalize this inversion of configuration. However, the same inversion could be explained by a completely different mechanism: Ring opening with C−C bond cleavage into a branched hydroxy‐5‐enal and the corresponding cyclic hemiacetal, followed by cascade cyclization under conformational control, including stereoselective C−C bond formation. In this report, a pnictogen‐bonding supramolecular Sb V catalyst is used to demonstrate that this unorthodox polyether cascade cyclization mechanism occurs." @default.
- W3097584206 created "2020-11-09" @default.
- W3097584206 creator A5037906302 @default.
- W3097584206 creator A5047415951 @default.
- W3097584206 creator A5063839659 @default.
- W3097584206 creator A5066285072 @default.
- W3097584206 date "2020-10-29" @default.
- W3097584206 modified "2023-10-09" @default.
- W3097584206 title "Pnictogen‐Bonding Catalysis: An Interactive Tool to Uncover Unorthodox Mechanisms in Polyether Cascade Cyclizations" @default.
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