Diazomethane umpolung atop anthracene: an electrophilic methylene transfer reagent.

Diazomethane umpolung atop anthracene: an electrophilic methylene transfer reagent.
复制标题

DOI:
10.1039/c7sc04506a
复制
发表时间:
2018-02-14
期刊:
影响因子:
8.4
通讯作者:
Cummins CC
Cummins CC
中科院分区:
化学1区
文献类型:
--
作者:
Joost M;Transue WJ;Cummins CC

文献摘要

参考文献

被引文献

相似文献

重氮甲烷的末端氮原子与蒽的9,10-位正式加成产生H2 CN 2A(1,A = C14 H10或蒽)。重氮甲烷的末端氮原子与蒽的9,10-位正式加成产生H2 CN 2A(1,A = C14 H10或蒽)。报道了由卡皮诺肼H2 N2 A经多聚甲醛处理合成这种腙。已经发现化合物1是一种易于处理的固体,其不表现出危险的热或冲击敏感性。重氮甲烷单元的有效极化使1在亚甲基碳中心具有亲电性。它与亲核试剂如H2 CPPh 3和N-杂环卡宾的反应性被用于CC键的形成,并消除二氮和蒽。类似地,1被证明将亚甲基传递到亲核单线态d2过渡金属中心W(ODipp)4(2),以生成稳健的亚甲基络合物[2CH 2]。这种行为与维蒂希试剂H2 CPPh 3的行为形成鲜明对比,H2 CPPh 3是一种更传统的布朗斯特德碱性亚甲基来源,暴露于2后会形成亚甲基盐[MePPh 3][2CH]。
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].
氧化亚烷基钨配合物的合成
DOI: 10.1021/om3008579
发表时间: 2012-10-22
期刊: ORGANOMETALLICS
影响因子: 2.8
作者:
Peryshkov, Dmitry V.;Schrock, Richard R.
通讯作者: Schrock, Richard R.
DOI: 10.1021/ja9012694
发表时间: 2009-06-10
影响因子: 15
作者:
Jiang, Annie J.;Simpson, Jeffrey H.;Schrock, Richard R.
通讯作者: Schrock, Richard R.
DOI: 10.1021/acscentsci.7b00174
发表时间: 2017-07-26
影响因子: 18.2
作者:
Gordon, Christopher P.;Yamamoto, Keishi;Eisenstein, Odile
通讯作者: Eisenstein, Odile
DOI: 10.1021/ol4035484
发表时间: 2014-02-07
期刊: ORGANIC LETTERS
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