A NEW APPROACH TO (±)-LEUKOTRIENE A<sub>4</sub>METHYL ESTER
作者:Sadao Tsuboi、Toshihide Masuda、Akira Takeda
DOI:10.1246/cl.1983.1829
日期:1983.12.5
A stereoselective synthesis of (2E,4Z,7Z)-2,4,7-tridecatrienol, a key intermediate in the synthesis of leukotriene A4methylester, is established via alumina-promoted rearrangement of ethyl (7Z)-3,4,7-tridecatrienoate to ethyl (2E,4Z,7Z)-2,4,7-tridecatrienoate as a key step.
Chemo-enzymatic enantio-convergent asymmetric total synthesis of (S)-(+)-dictyoprolene using a kinetic resolution—stereoinversion protocol
作者:Andreas Wallner、Harald Mang、Silvia M. Glueck、Andreas Steinreiber、Sandra F. Mayer、Kurt Faber
DOI:10.1016/s0957-4166(03)00481-6
日期:2003.8
A single enantiomer of a (stereo)chemically labile allylic-homoallylic alcohol was obtained in 91% e.e. and 96% yield from the racemate by employing a lipase-catalysed kinetic resolution coupled to in situ inversion under carefully controlled (Mitsunobu) conditions in order to Suppress side reactions, such as elimination and racemisation. This technique was Successfully applied to an enantio-convergent asymmetric total synthesis of the algal fragrance component (S)-dictyoprolene. (C) 2003 Elsevier Ltd. All rights reserved.
NONOSHITA, KATSUMASA;BANNO, HIROSHI;MARUOKA, KEIJI;YAMAMOTO, HISASHI, J. AMER. CHEM. SOC., 112,(1990) N, C. 316-322