Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The title reaction was achieved with Et 3 SiH in the presence of a catalytic amount of CF 3 SO 3 SiMe 3 . The reaction was applied to the synthesis of (±)-exo-brevicomine. ... High trans-selectivity might be rationalized as follows. That is, the counter anion is placed on the opposite side ...