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	C-2-symmetric hindered "sandwich" chiral n-heterocyclic carbene precursors and their transition metal complexes: expedient syntheses, structural authentication, and catalytic properties
	Liu, Cong; Shen, Hong-Qiang; Chen, Mu-Wang; Zhou, Yong-Gui
刊名	Organometallics
	2018-11-12
卷号	37期号:21页码:3756-3769
ISSN号	0276-7333
DOI	10.1021/acs.organomet.8b00492
通讯作者	Zhou, yong-gui(ygzhou@dicp.ac.cn)
英文摘要	We present here a new family of c-2-symmetric "sandwich" nhc ligands abbreviated as sitlar and bzitl(ar) and their complexes. the chiral fragments incorporate bulky yet flexible cyclohexyl groups with alpha-stereocenters joined to nitrogens individually, which set up chiral pockets around pivotal carbene carbons (less than 2.5 angstrom). full characterization revealed unique structures with roughly parallel aryl moieties above and below imidazoline and benzimidazole planes in the z-shaped arrangement. extra hydrogen bonding interactions and steric stress between the square-planar frameworks and aryl groups led to the exceptional confinement and reversed the configurations in the iridium complexes. in accordance with tolman's electronic parameters and topographic steric maps of well-established metalated complexes, these new ligands possess strong electron-donating properties and exceptionally steric demands. additionally, the preliminary results employing the bzitl(ar) ligands allowed appropriate activities and provided potential applications for asymmetric induction in the enantioselective aryl transfer and hydrosilylation reactions with moderate enantioselectivity.
WOS关键词	ALLYLIC ALKYLATION ; ARYLBORONIC ACIDS ; RESTRICTED FLEXIBILITY ; NUCLEOPHILIC CARBENES ; ASYMMETRIC ADDITION ; IMIDAZOLIUM SALTS ; STERIC PROPERTIES ; NHC COMPLEXES ; LIGANDS ; EFFICIENT
WOS研究方向	Chemistry
WOS类目	Chemistry, Inorganic & Nuclear ; Chemistry, Organic
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000450374500015
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2373038
专题	大连化学物理研究所
通讯作者	Zhou, Yong-Gui
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Liu, Cong,Shen, Hong-Qiang,Chen, Mu-Wang,et al. C-2-symmetric hindered "sandwich" chiral n-heterocyclic carbene precursors and their transition metal complexes: expedient syntheses, structural authentication, and catalytic properties[J]. Organometallics,2018,37(21):3756-3769.
APA	Liu, Cong,Shen, Hong-Qiang,Chen, Mu-Wang,&Zhou, Yong-Gui.(2018).C-2-symmetric hindered "sandwich" chiral n-heterocyclic carbene precursors and their transition metal complexes: expedient syntheses, structural authentication, and catalytic properties.Organometallics,37(21),3756-3769.
MLA	Liu, Cong,et al."C-2-symmetric hindered "sandwich" chiral n-heterocyclic carbene precursors and their transition metal complexes: expedient syntheses, structural authentication, and catalytic properties".Organometallics 37.21(2018):3756-3769.

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