618895-97-9Relevant articles and documents
Studies on flavans. III. The total synthesis of (±)-7,4′ -dihydroxy-3′-methoxyflavan, (±)-7,3′-dihydroxy-4′ -methoxyflavan, and (±)-7,4′-dihdroxyflavan
Xue, Jijun,Zhang, Xianshu,Chen, Xuesong,Zhang, Yingpeng,Li, Ying
, p. 3527 - 3536 (2007/10/03)
The first total synthesis of (±)-7,3′-dihydroxy-4′ -methoxyflavan (1) and (±)-7,4′-dihydroxy-3′-methoxyflavan (2), along with the synthesis of (±)-7,4′-dihydroxyflavan (3), three naturally occurring flavans, were described. The key step is the cyclization of 1,3-diaryl-1-propanol by BF3·Et2O.
