Diazomethane umpolung atop anthracene: an electrophilic methylene transfer reagent.
Diazomethane umpolung atop anthracene: an electrophilic methylene transfer reagent.
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DOI:
10.1039/c7sc04506a
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发表时间:
2018-02-14
期刊:
影响因子:
8.4
通讯作者:
Cummins CC
中科院分区:
文献类型:
--
作者:
Joost M;Transue WJ;Cummins CC
Formal addition of diazomethane's terminal nitrogen atom to the 9,10-positions of anthracene yields H2CN2A (1, A = C14H10 or anthracene). Formal addition of diazomethane's terminal nitrogen atom to the 9,10-positions of anthracene yields H2CN2A (1, A = C14H10 or anthracene). The synthesis of this hydrazone is reported from Carpino's hydrazine H2N2A through treatment with paraformaldehyde. Compound 1 has been found to be an easy-to-handle solid that does not exhibit dangerous heat or shock sensitivity. Effective umpolung of the diazomethane unit imbues 1 with electrophilicity at the methylene carbon center. Its reactivity with nucleophiles such as H2CPPh3 and N-heterocyclic carbenes is exploited for CC bond formation with elimination of dinitrogen and anthracene. Similarly, 1 is demonstrated to deliver methylene to a nucleophilic singlet d2 transition metal center, W(ODipp)4 (2), to generate the robust methylidene complex [2CH2]. This behavior is contrasted with that of the Wittig reagent H2CPPh3, a more traditional and Brønsted basic methylene source that upon exposure to 2 contrastingly forms the methylidyne salt [MePPh3][2CH].
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影响因子:
2.8
作者:
Peryshkov, Dmitry V.;Schrock, Richard R.
通讯作者:
Schrock, Richard R.
影响因子:
15
作者:
Jiang, Annie J.;Simpson, Jeffrey H.;Schrock, Richard R.
通讯作者:
Schrock, Richard R.
影响因子:
18.2
作者:
Gordon, Christopher P.;Yamamoto, Keishi;Eisenstein, Odile
通讯作者:
Eisenstein, Odile
影响因子:
5.2
作者:
Chase, Daniel T.;Moerdyk, Jonathan P.;Bielawski, Christopher W.
通讯作者:
Bielawski, Christopher W.
DOI:
10.1039/dt9840001349
发表时间:
1984-01-01
期刊:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
影响因子:
--
作者:
ADDISON, AW;RAO, TN;VERSCHOOR, GC
通讯作者:
VERSCHOOR, GC