Catalytic asymmetric α-Iminol rearrangement: new chiral platforms.
Catalytic asymmetric α-Iminol rearrangement: new chiral platforms.
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催化不对称α-iminol重排:新的手性平台。
DOI:
10.1021/ja5065685
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发表时间:
2014-10-08
影响因子:
15
通讯作者:
Wulfft, William D.
中科院分区:
文献类型:
--
作者:
Zhang, Xin;Staples, Richard J.;Rheingold, Arnold L.;Wulfft, William D.
A series of 19 different asymmetric catalysts were screened in an effort to identify the first chiral catalyst for the rearrangement of α-hydroxy imines to α-amino ketones involving a 1,2-carbon shift. Although aluminate complexes of VAPOL, VANOL, and 7,7′-tBu2VANOL were quite effective catalysts giving up to 88% ee, the ne plus ultra catalyst for this reaction was found to be a zirconium complex of VANOL which gives 97 to >99% ee for the majority of the substrates examined. An X-ray diffraction study of the catalyst reveals that the zirconium exists as a homoleptic complex with three VANOL ligands and two protonated N-methyl imidazoles.
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影响因子:
15
作者:
Hu, Gang;Gupta, Anil K.;Wulff, William D.
通讯作者:
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影响因子:
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