Nakamura Y, Ochiai T, Makino K, Shimada N. Boronic Acid-Catalyzed Final-Stage
Site-Selective Acylation for the Total Syntheses of O-3'-Acyl Bisabolol β-D-Fucopyranoside Natural Products and Their Analogues.
Chem Pharm Bull (Tokyo) 2021;
69:281-285. [PMID:
33642477 DOI:
10.1248/cpb.c20-00834]
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Abstract
The first concise total syntheses of O-3'-senecioyl α-bisabolol β-D-fucopyranoside (4a) and O-3'-isovaleroyl α-bisabolol β-D-fucopyranoside (4b) were achieved through final-stage site-selective acylation via the activation of cis-vicinal diols by imidazole-containing boronic acid catalysts as a key step. This synthetic method was also effective for the syntheses of unnatural analogues with modified acyl side chains or carbohydrate moiety.
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