期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 27, 页码 11092-11095出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja303506k
关键词
-
资金
- CREST, Japan Science and Technology Agency (JST)
The poly(quinoxaline-2,3-diyl)-based helically chiral phosphine ligands PQXphos exhibited high enantioselectivities up to 97% ee in palladium-catalyzed desymmetrization of meso-1,2-dialkylsubstituted-3-methylenecyclopropanes through silaborative cleavage of the C C bond. The observed enantioselectivities were higher than those obtained with 2-diarylphosphino-1,1'-binaphthyl in our original report. Remarkable rate enhancement was also observed with a series of PQXphos in comparison with the corresponding low-molecular weight ligands.
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