Novel access to azaphosphiridine complexes and first applications using Brønsted acid-induced ring expansion reactions.
Novel access to azaphosphiridine complexes and first applications using Brønsted acid-induced ring expansion reactions.
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使用布伦斯台德酸诱导扩环反应获得氮杂磷啶配合物的新途径和首次应用
DOI:
10.1039/b922166b
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发表时间:
2010
影响因子:
4
通讯作者:
R. Streubel
中科院分区:
文献类型:
--
作者:
S. Fankel;H. Helten;G. von Frantzius;G. Schnakenburg;J. Daniels;V. Chu;C. Müller;R. Streubel
Synthesis of azaphosphiridine complexes 3a-e was achieved via thermal group transfer reaction using 2H-azaphosphirene complex 1 and N-methyl C-aryl imines 2a-e (i) or via reaction of transient Li/Cl phosphinidenoid complex 5 (prepared from dichloro(organo)phosphane complex 4) using 2a-c (ii), respectively. Reaction of complexes 3a,d and trifluoromethane sulfonic acid in the presence of dimethyl cyanamide led to a highly bond- and regioselective ring expansion yielding 1,3,4σ3λ3-diazaphosphol-2-ene complexes 8a,d after deprotonation with NEt3. 31P NMR reaction monitoring revealed that protonation of complex 3a yields the azaphosphiridinium complex 6a, unambiguously identified by NMR spectroscopy at low temperature. All isolated products were characterized by multinuclear NMR spectroscopy, IR and UV/Vis (for 3a,d, 6a, 8a,d), MS and single-crystal X-ray crystallography in the cases of complexes 3b-d, 8a and 8d. DFT studies on the reaction mechanism and compliance constants of the model complex of 6a are presented.
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DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
D. R. Crist;N. Leonard
通讯作者:
N. Leonard
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
E. Niecke;Anette Seyer;D. Wildbredt
通讯作者:
D. Wildbredt
影响因子:
--
作者:
Aysel Ozbolat;Gerd von Frantzius;J. M. Pérez;M. Nieger;R. Streubel
通讯作者:
R. Streubel
DOI:
--
发表时间:
1970
期刊:
影响因子:
--
作者:
M. Bigorgne;R. Poilblanc;M. Pankowski
通讯作者:
M. Pankowski
影响因子:
3.4
作者:
R. Vičík;Holger Helten;T. Schirmeister;B. Engels
通讯作者:
B. Engels