A versatile and highly stereocontrolled synthetic approach to homochiral polyfunctional norbornene and norbornane derivatives
作者:Ramon Casas、Javier Ibarzo、José M. Jiménez、Rosa M. Ortuño
DOI:10.1016/s0957-4166(00)80174-3
日期:1993.4
chiral precursor. The target molecules include pairs of enantiomers and their configuration has mainly been assured by controlling the facial and the endo/exo diastereoselectivity in the Diels-Alderreactions of chiral cyclic or acyclic dienophiles. Some of the products obtained are key intermediates in the synthesis of biologically active compounds.
Enantioselective production of homochiral (+)-(1R,2S,3S,4S)- and (−)-(1S,2R,3R,4R)-bicyclo(2.2.1)heptane-2,3-dicarboxylic acid, 2-methyl esters. Formal synthesis of the TXA2 antagonist S-1452.
作者:Ramon Casas、Rosa M. Oituõ
DOI:10.1016/s0957-4166(00)82106-0
日期:1992.9
Both enantiomers of the title half ester have been synthesized from -mannitol as single chiral precursor. The -enantiomer is the key intermediate in the synthesis of the TXA2 antagonistic drug S-1452.