A borate propeller compound as a chiral catalyst for an asymmetrically induced Diels-Alder reaction.
In: Angewandte Chemie, Jg. 102 (1990) ; Nr. 5, S. 568-569
Zeitschriftenaufsatz / Fach: Chemie
H2C:CMeCHO underwent asym. Diels-Alder reaction with cyclopentadiene in presence of the hexanaphthohexaoxadiborabicycloeicosahexaene I to give the (+)-exo-methylbicycloheptenecarboxaldehyde II in 85% yield. I was prepd. from (S)-(-)-2,2'-dihydroxy-1,1'-binaphthyl and H2BBr.SMe2. The structure of I was detd. by x-ray crystallog.