O. Dirat et al., Oxazoline N-oxide-mediated [2+3] cycloadditions. Application to a synthesis of (-)-tetrahydrolipstatin, ORG LETT, 1(5), 1999, pp. 753-755
[GRAPHICS]
A [2+3] cycloaddition of camphor derived oxazoline N-oxide to alpha,beta-un
saturated ester afforded adduct 8, Tetrahydrolipstatin 1 was prepared from
this compound in a nine step sequence of reactions.