A STEREODIVERGENT SYNTHESIS OF (+ -)-CYCLOPHELLITOL AND (1R-ASTERISK,6S-ASTERISK)-CYCLOPHELLITOL FROM THE 7-OXABICYCLO[2.2.1]HEPT-5-ENE-2-ENDO-CARBOXYLIC ACID/
Jl. Acena et al., A STEREODIVERGENT SYNTHESIS OF (+ -)-CYCLOPHELLITOL AND (1R-ASTERISK,6S-ASTERISK)-CYCLOPHELLITOL FROM THE 7-OXABICYCLO[2.2.1]HEPT-5-ENE-2-ENDO-CARBOXYLIC ACID/, Tetrahedron letters, 37(17), 1996, pp. 3043-3044
A concise, stereodivergent synthesis of (+/-)-cyclophellitol 1 and its
unnatural diastereoisomer (1R,6S*)-cyclopbellitol 2 starting from th
e Diels-Alder adduct of furan and acrylic acid is reported. The stereo
chemistry of the key step (the epoxidation of alkene 3) is controlled
by the nature of the hydroxyl protecting groups. (C) 1996 Elsevier Sci
ence Ltd.