File:ETH AD Approach.svg

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Vitamin B12 total syntheses (ETH A/D approach to cobyric acid): Attaching Ring-C and Ring-A Precursors to the B-C-Component to yield the A/D-seco-Corrin

Summary

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Description
English: Stepwise coupling of the ETH B-C-component with ETH ring-D and ring-A precursors by Eschenmoser sulfide contraction to an A/D-seco-corrin (starting material for the photochemical A/D-seco-corrin → corrin cycloisomerization)
Date
Source Own work
Author Easyloc

Eschenmoser, A. (1971). Studies on Organic Synthesis. XXIIIrd International Congress of Pure and Applied Chemistry: special lectures presented at Boston, USA, 26-30 July 1971. 2. London: Butterworths. pp. 69–106. doi:10.3929/ethz-a-010165162. hdl:20.500.11850/84699. ISBN 0-408-70316-4.

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