910564-62-4Relevant academic research and scientific papers
Seven-Step Stereodivergent Total Syntheses of Punicafolin and Macaranganin
Shibayama, Hiromitsu,Ueda, Yoshihiro,Tanaka, Takashi,Kawabata, Takeo
, p. 1428 - 1434 (2021)
The first total syntheses of punicafolin (1) and macaranganin (2) were achieved in seven steps, respectively, from commercial α-d-glucose. The characteristic features of the synthesis are (1) sequential site-selective introduction of the adequate galloyl groups into unprotected d-glucose by a catalyst-controlled manner and (2) stereodivergent construction of the 3,6-HHDP bridge by oxidative phenol coupling of a common intermediate via a ring-flipping process of the glucose core. Because no protective groups were used for glucose throughout the process, extremely short-step total syntheses of natural glycosides 1 and 2 (MW 938) were performed.
