Ring-Conformer Effects of the Cyclopropyl Group: First Use of trans-(2R,3R)-Cyclopropanecarbaldehydes as Electrophiles in Diastereoselective Baylis-Hillman Reaction
Ring-Conformer Effects of the Cyclopropyl Group: First Use of trans-(2R,3R)-Cyclopropanecarbaldehydes as Electrophiles in Diastereoselective Baylis-Hillman Reaction
trans-(2R,3R)-Cyclopropanecarbaldehydes are used as novel electrophiles in the Baylis-Hillman reaction to afford adducts in good yields (75-85%) and diastereoselectivities (60-90%).
The first total synthesis of the marine fatty acid (±)-9-methoxypentadecanoic acid: a synthetic route towards mid-chain methoxylated fatty acids
作者:Néstor M. Carballeira、Carlos Miranda
DOI:10.1016/s0009-3084(03)00043-4
日期:2003.6
first time for this type of methoxylated fatty acids and the synthetic approach utilized is of general applicability since it can be used in the synthesis of other mid-chain methoxylated fatty acids. This synthetic methodology should afford sufficient quantities of these fatty acids for biological evaluation. The spectral data obtained for the title compound will also be helpful in subsequent characterizations
The enantioselective total synthesis of (+)-patulolide C isolated from Penicillium urticae has been achieved from commercially available 9-decen-1-ol. Jacobsen's kinetic resolution and sequential alpha-aminooxylation and Horner-Wadsworth-Emmons (HWE) olefination followed by Yamaguchi lactonization are used as the key reaction steps. (C) 2010 Elsevier Ltd. All rights reserved.