Cq. Wei et al., An unexpected synthesis of an alpha, beta, gamma, delta-unsaturated ketonedue to an abnormal opening of benzylidene acetal by bromide anion, CHIN J CHEM, 18(2), 2000, pp. 212-219
An unexpected synthesis of an alpha, beta, gamma, delta-unsaturated ketone,
which embodies a new type of oxy-carbon cyclic structure, was achieved, wh
ile we tried to construct the taxane CB-ring system. Also, a series of abno
rmal reaction phenomena was found to be related to the formation and reacti
on of seven membered cyclic benzylidene acetal.