A Highly Stereoselective Synthesis of C(11)-Functionalized Aromatic Steroids by an Intramolecular Benzocyclobutene-Olefin -Cycloaddition. Preliminary Communication
作者:Wolfgang Oppolzer、Martin Petrzilka、Kurt Bättig
DOI:10.1002/hlca.19770600849
日期:1977.12.14
The racemic cis-anti-trans-steroids 9 to 11 have been synthesized in a highlystereoselective manner starting from 4-methoxybenzocyclobutene carboxylic acid via the key step 8 9. (cf. Scheme 2).
Preparation of chiral cyclobutane derivatives: enantioselective syntheses of the key intermediates for cyclobutane monoterpenes, grandisol and lineatin
作者:Tetsuya Toya、Hiromasa Nagase、Toshio Honda
DOI:10.1016/s0957-4166(00)80356-0
日期:1993.7
Enantioselective synthesis of the key intermediates for cyclobutane monoterpenes, grandisol and lineatin was achieved by employing an enantioselective reduction of the prochiral cyclobutenone derivative as a key step.