Photolysis of α-Azidoacetophenones: Trapping of Triplet Alkyl Nitrenes in Solution
作者:Sarah M. Mandel、Jeanette A. Krause Bauer、Anna D. Gudmundsdottir
DOI:10.1021/ol0068750
日期:2001.2.1
[GRAPHICS]Selective excitation of the ketone chromophore in alpha -azidoacetophenones, 1, leads to intramolecular triplet energy transfer to the azido group, which forms the corresponding triplet alkyl nitrene, 2. Azides 1 also undergo a cleavage to form benzoyl and methyl azido radicals in competition with nitrene formation. Thus the major photoproduct, 2 benzoylamino-1-phenylethanone, 3, comes from trapping of 2 with a benzoyl radical. This appears to be the first observation of bimolecular trapping of triplet alkyl nitrenes in solution.
Dann,O. et al., Justus Liebigs Annalen der Chemie, 1975, p. 160 - 194
作者:Dann,O. et al.
DOI:——
日期:——
DAS B. P.; WALLACE R. A.; BOYKIN D. W. JR., J. MED. CHEM., 1980, 23, NO 5, 578-581
作者:DAS B. P.、 WALLACE R. A.、 BOYKIN D. W. JR.
DOI:——
日期:——
DANN O.; FICK H.; PIETZNER B.; WALKENHORST E.; FERNBACH R.; ZEH D., J. LIEBIGS ANN. CHEM. <JLAC-BF>, 1975, NO 1, 160-194
作者:DANN O.、 FICK H.、 PIETZNER B.、 WALKENHORST E.、 FERNBACH R.、 ZEH D.
DOI:——
日期:——
Photolysis of α-Azidoacetophenones: Direct Detection of Triplet Alkyl Nitrenes in Solution
作者:Pradeep N. D. Singh、Sarah M. Mandel、Rachel M. Robinson、Zhendong Zhu、Roberto Franz、Bruce S. Ault、Anna D. Gudmundsdóttir
DOI:10.1021/jo034674e
日期:2003.10.1
of triplet alkyl nitrenes in fluid solution by laser flash photolysis of alpha-azido acetophenone derivatives, 1. Alphazides 1 contain an intramolecular triplet sensitizer, which ensures formation of the triplet alkyl nitrene by bypassing the singlet nitrene intermediate. At room temperature, azides 1 cleave to form benzoyl and methylazide radicals in competition with triplet energy transfer to form