Synthesis, Structure and Reactivity of a Cyapho(dicyano)methanide Salt.
Synthesis, Structure and Reactivity of a Cyapho(dicyano)methanide Salt.
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DOI:
10.1002/anie.202208921
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发表时间:
2022-09-26
影响因子:
16.6
通讯作者:
Goicoechea, Jose M.
中科院分区:
文献类型:
--
作者:
Hu, Chenyang;Goicoechea, Jose M.
We describe the synthesis of a cyapho(dicyano)methanide salt, [K(18‐crown‐6)][C(CN)2(CP)], from reaction of [Na(18‐crown‐6)][PH2] (18‐crown‐6=1,4,7,10,13,16‐hexaoxacyclooctadecane) with 1,1‐diethoxy‐2,2‐dicyanoethylene (EtO)2C=C(CN)2. The reaction proceeds through a Michael addition‐elimination pathway to afford [Na(18‐crown‐6)][HP{C(OEt)=C(CN)2}]. Addition of a strong, non‐nucleophilic base (KHMDS) to this intermediate results in the formation of [K(18‐crown‐6)][C(CN)2(CP)]. Subsequent reactivity studies reveal that the cyapho(dicyano)methanide ion is susceptible to protonation with strong acids to afford the parent acid HC(CN)2(CP). The reactivity of the cyaphide moiety in [C(CN)2(CP)]− was explored through coordination to metal centers and in cycloaddition reactions with azides. We describe the synthesis of the cyapho(dicyano)methanide ion, [C(CN)2(CP)]−, by reaction of sodium phosphanide with (EtO)2C=C(CN)2. This species can be readily protonated at the methanide carbon atom to afford the parent acid, HC(CN)2(CP), which readily decomposes at room temperature. The reactivity of the cyaphide moiety was also probed by reaction with nucleophiles and in cycloaddition reactions.
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DOI:
10.1002/zaac.19926120113
发表时间:
1992-06-01
影响因子:
1.4
作者:
BECKER, G;SCHWARZ, W;WESTERHAUSEN, M
通讯作者:
WESTERHAUSEN, M
DOI:
10.1039/c39880000171
发表时间:
1988-02-01
影响因子:
--
作者:
ARIF, AM;BARRON, AR;HALL, SW
通讯作者:
HALL, SW
影响因子:
--
作者:
BOYD, RH
通讯作者:
BOYD, RH
影响因子:
4.3
作者:
Binder, Justin F.;Kosnik, Stephanie C.;Macdonald, Charles L. B.
通讯作者:
Macdonald, Charles L. B.
影响因子:
15
作者:
Bernsdorf, Arne;Brand, Harald;Voss, Karsten
通讯作者:
Voss, Karsten