SYNTHESIS OF (+)-α-CURCUMENE, (+)-CURCUMONE AND (-)-METHYL CITRONELLATE STARTING FROM OPTICALLY PURE 5-TRIMETHYLSILYL-2-CYCLOHEXENONE

Article abstract of DOI:10.1016/S0040-4020(01)86178-0

1,4-addition of Grignard reagents in the presence of chlorotrimethylsilane to 5-trimethylsilyl-2-cyclohexanone (1) proceeded in a highly diastereoselective manner to give trans adducts in high yields. (+)-α-Curcumene, (+)-curcumone and (-)-methyl citronellate were synthesized starting from optically pure 1.