An Effective Method for the Synthesis of<sup>13</sup>C-Labeled Polyprenylhydroxybenzoic Acids
作者:Wolfgang Steglich、Martin Lang
DOI:10.1055/s-2005-861863
日期:——
The synthesis of side-chain 13C-labeled geranylgeranyl-4-hydroxybenzoic acids and geranylgeranyl-3,4-dihydroxybenzoic acids is described. The synthesis starts from O-protected methyl hydroxyiodobenzoates, which are transformed into Grignard reagents by low-temperature iodine-magnesium exchange according to Knochel’s procedure. Copper catalyzed cross-coupling with labeled geranylgeranyl bromide followed by deprotection affords the products with good yields and full retention of stereochemistry.