Evaluation of asymmetric Diels–Alder approaches for the synthesis of the cyclohexene subunit of CP-225,917 and CP-263,114
作者:Alan Armstrong、Nicholas G.M. Davies、Nathaniel G. Martin、Alistair P. Rutherford
DOI:10.1016/s0040-4039(03)00835-9
日期:2003.5
Asymmetric synthesis of a functionalised cyclohexenone required for total synthesis of CP-225,917 and CP-263,114 is reported, using a Lewis acid-promoted Diels–Alderreaction between a 2-silyloxy-1,3-diene and a dienophile bearing an oxazolidinone auxiliary. A novel method for appendage of the exocyclic malonate unit, via cyclopropane ring opening, is also described.