We have developed catalytic allylation reactions of sulfonylimidates using allylic alcohols as allylating reagents. Stoichiometric amounts of neither activators nor bases are required in this reaction.
DBU-Catalyzed Addition Reactions of Sulfonylimidates
作者:Shu Kobayashi、Ryosuke Matsubara
DOI:10.1055/s-2008-1067251
日期:2008.9
Sulfonylimidates react with various types of N-protected imines in the presence of a catalytic amount of DBU to afford β-aminosulfonylimidates in high yields and high anti-selectivities. The experimental procedure is described in detail.
Catalytic Mannich-Type Reactions of Sulfonylimidates
作者:Ryosuke Matsubara、Florian Berthiol、Huy V. Nguyen、Shu Kobayashi
DOI:10.1246/bcsj.82.1083
日期:2009.9.15
case of Ts-imidate. Alkali earth metal alkoxide and its HMDS salt also catalyze Mannich-type reactions of sulfonylimidates. The reactionscatalyzed by Mg(O t Bu) 2 in DMF provided the adducts with high anti selectivity, while those catalyzed by [Sr(HMDS) 2 ] 2 gave syn selectivity. The asymmetric variant of Mannich-type reaction of sulfonylimidate was also achieved. Several transformations of sulfonylimidates