Asymmetric Diels–Alder addition of cyclopentadiene to chiral naphthoquinones
作者:Margaret A Brimble、John F McEwan、Peter Turner
DOI:10.1016/s0957-4166(98)00087-1
日期:1998.4
cyclopentadiene under Lewis acid conditions afforded the corresponding Diels–Alder adducts. High levels of diastereomeric excess were obtained using (R)-pantolactone, (S)-N-methyl-2-hydroxysuccinimide and trans-2-phenylcyclohexanol as auxiliaries. Moderate asymmetric induction was achieved using Oppolzer's camphorsultam and (R)-(+)-4-benzyl-2-oxazolidinone as auxiliaries. X-Ray crystallographic analysis of the