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4444271432
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c) L. Cristian, I. Sasaki, P. G. Lacroix, B. Donnadieu, I. Asselberghs, K. Clays, A. C. Razus, Chem. Mater. 2004, 16, 3543-3551, and references therein.
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23
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33645391336
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note
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3, Pd/C; p-chloranil, Δ; HCl, Δ; Martin sulfurane reagent, were not fruitful.
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24
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0037010783
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Rahaim Jr., R.J.1
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29
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0000491823
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b) 1,4-dimethylazulene is naturally occurring, see: D. Meuche, S. Huneck, Chem. Ber. 1966, 99, 2669-2674;
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32
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33645405111
-
-
note
-
It should be noted that the aromatization of the azulenes, not unexpectedly, is directly dependent on the degree of unsaturation in the substrates; see reference [3b].
-
-
-
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33
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-
0003600722
-
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Academic Press, New York
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Chamazulene is an artifact from various sesquiterpene oils; 7-isopropyl-4-methylazulene and guaiazulene are found naturally in different sources, see: a) T. K. Devon, A. I. Scott in Handbook of Naturally Occurring Compounds, Vol. 2, Academic Press, New York, 1972;
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Devon, T.K.1
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0004205843
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Chapman and Hall, New York, and references therein
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Stahl, E.1
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39
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33645410992
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Robugen GmbH Pharmazeutische Fabrik Esslingen A.N. , Germany DE 10065683, 2001
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an earlier synthesis has been reported in a patent, see: Robugen GmbH Pharmazeutische Fabrik Esslingen A.N. , Germany DE 10065683, 2001 [Chem. Abstr. 2001, 135, 76 647t].
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Chem. Abstr.
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40
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33645406340
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note
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2;
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-
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41
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-
33645393014
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-
note
-
3, the Burgess reagent, and p-chloranil;
-
-
-
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42
-
-
33645404169
-
-
note
-
c) obtained from 7-phenylcycloheptatriene; see references [4a,5];
-
-
-
-
43
-
-
33645387986
-
-
note
-
d) prepared from 6b by using phenylboronic acid rather than methylboronic acid (98 % yield);
-
-
-
-
44
-
-
33645383316
-
-
note
-
2O and Pd/C in toluene (50 % yield), for several related examples, see reference [4a];
-
-
-
-
45
-
-
0036335247
-
-
4], and DMF; for other examples of aza azulenes, see: M. Kitamura, S. Chiba, O. Saku, K. Narasaka, Chem. Lett. 2002, 606-607.
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