Total Synthesis of (<i>R</i>)-Sarkomycin via Asymmetric Rhodium-Catalyzed Conjugate Addition
作者:Johannes Westmeier、Steffen Kress、Christopher Pfaff、Paultheo von Zezschwitz
DOI:10.1021/jo4016979
日期:2013.11.1
using a five-step total synthesis. Key steps in the enantioselective construction of the targeted scaffold were a rhodium-catalyzed asymmetric conjugate alkenyl addition with subsequent silyl trapping and a Mukaiyama aldolreaction with aqueous formaldehyde. Protection of the hydroxy group as a THP acetal and oxidative cleavage of the C,C-double bond provided a stable direct precursor to the natural