C 2的新家族选自Ar-BINMOLs -axially手性单膦(AR-专业NNP)是为(呋喃-2-基氧基)与芳族醛亚胺三甲基硅烷的银催化的不对称插烯曼尼希反应的发展。据发现,trimethylsiloxyfuran与醛亚胺对映选择性插烯曼尼希型反应通过银有效地催化(I)上述Ar-BINMOL衍生的手性单膦的络合物。这个过程显示宽醛亚胺的通用性,优异的产率(高达99%的分离产率),中度至良好的对映选择性(高达78%ee)和非对映选择性出色的(> 99:1个,DR)在大多数情况下检查。重新-nucleophilic除了siloxyfuran到亚胺。
Axially Chiral Phosphine-Oxazoline Ligands in Silver(I)- Catalyzed Asymmetric Mannich Reaction of Aldimines with Trimethylsiloxyfuran
作者:Hong-Ping Deng、Yin Wei、Min Shi
DOI:10.1002/adsc.200900550
日期:2009.11
A new asymmetric catalytic system for the Mannichreaction of aldimines with trimethylsiloxyfuran is described. The combination of an axiallychiralphosphine-oxazolineligand (S)-2-[(R)-2′-(diphenylphosphino)-1,1′-binaphthyl-2-yl]-4-phenyl-4,5-dihydrooxazole with silver acetate and 2,2,2-trifluoroacetic acid is a very effective catalytic system in the asymmetricMannichreaction of various aldimines