Metalated Nitriles: Stereodivergent Cation-Controlled Cyclizations1.
Metalated Nitriles: Stereodivergent Cation-Controlled Cyclizations1.
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DOI:
10.1016/j.tet.2008.05.110
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发表时间:
2008-08-04
期刊:
影响因子:
2.1
通讯作者:
Zhang, Zhiyu
中科院分区:
文献类型:
--
作者:
Fleming, Fraser F.;Wei, Yunjing;Liu, Wang;Zhang, Zhiyu
Stereodivergent cyclizations of γ-hydroxy cyclohexanecarbonitriles are controlled simply through judicious choice of cation in the alkylmetal base. Deprotonating a series of cyclic γ-hydroxy nitriles with i-PrMgBr generates C-magnesiated nitriles that cyclize under stereoelectronic control to cis-fused hydrindanes, decalins, and bicyclo [5.4.0] undecanes. An analogous deprotonation with BuLi triggers cyclization to trans-fused hydrindanes, decalins, and bicyclo [5.4.0] undecanes consistent with a sterically controlled electrophilic attack on an equatorial nitrile anion. Using cations to control the geometry of metalated nitriles provides a versatile, stereodivergent cyclization to cis- and trans-hydrindanes, decalins, and [5. 4. 0] undecanes, and reveals the key geometric requirements for intramolecular SN2 and SN2′ displacements.
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影响因子:
3.6
作者:
BERNADY, KF;POLETTO, JF;WEISS, MJ
通讯作者:
WEISS, MJ
影响因子:
5.2
作者:
Carlier, Paul R.;Zhang, Yiqun
通讯作者:
Zhang, Yiqun
影响因子:
2.1
作者:
CATIVIELA, C;DIAZDEVILLEGAS, MD;LAPENA, Y
通讯作者:
LAPENA, Y
DOI:
10.1039/dt9790001862
发表时间:
1979-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子:
--
作者:
DELPRA, A;FORSELLINI, E;ROS, R
通讯作者:
ROS, R
DOI:
10.1002/anie.197508011
发表时间:
1975-01-01
期刊:
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH
影响因子:
--
作者:
APPEL, R
通讯作者:
APPEL, R