First Total Synthesis and Assignment of the Stereochemistry of Crispatenine
摘要:
[GRAPHICS]The first racemic and enantioselective synthesis of crispatenine 1 has been achieved, which involved a few steps, enabling the assignment of the absolute and relative configurations.
A simple and efficient enantioselective synthesis of γ-cyclohomocitral, a key and versatile intermediate for the synthesis of some monocyclofarnesane terpenoids, is described. This features a highly sitoselective Sharpless asymmetric didydroxylation of a homomonoterpene diolefin. The first enantioselective synthesis of (−)-ancistrodial and (−)-pallescensone were accomplished. The (S)- configuration