Enantioselective Addition of Allyltin Reagents to Amino Aldehydes Catalyzed with Bis(oxazolinyl)phenylrhodium(III) Aqua Complexes
作者:Yukihiro Motoyama、Takatoshi Sakakura、Toshihide Takemoto、Kayoko Shimozono、Katsuyuki Aoki、Hisao Nishiyama
DOI:10.3390/molecules16075387
日期:——
Bis(oxazolinyl)phenylrhodium(III) aqua complexes, (Phebox)RhX2(H2O) [X = Cl, Br], were found to be efficient Lewis acid catalysts for the enantioselective addition of allyl- and methallyltributyltin reagents to amino aldehydes. The reactions proceed smoothly in the presence of 5–10 mol % of (Phebox)RhX2(H2O) complex at ambient temperature to give the corresponding amino alcohols with modest to good enantioselectivity (up to 94% ee).
研究发现,(Phebox)RhX2(H2O) [X = Cl, Br]双(噁唑啉基)苯基铑(III)水络合物是烯丙基和甲基烯丙基三丁基锡试剂与氨基醛进行对映体选择性加成反应的高效路易斯酸催化剂。在 5-10 mol % 的 (Phebox)RhX2(H2O) 复合物存在下,反应在常温下顺利进行,生成相应的氨基醇,对映体选择性一般,但很好(ee 值高达 94%)。