MECHANISM OF FORMATION OF TETRAHYDROFURAN
1541
6. Wambach, L., Irgang, M., and Fischer, M., FRG Patent
no. 3632255, 1988; Chem. Abstr., 1988, vol. 109,
no. 24520.
(polyphenylmethylsiloxane) on Polikhrom-1; carrier
gas helium; oven temperature programming from 75 to
225°C; 1,4-dioxane was used as internal standard.
7. O’ Sullivan, D., Chem. Eng. News, 1992, vol. 70, p. 6.
Succinic anhydride, γ-butyrolactone, butane-1,4-
diol, propan-1-ol, and butan-1-ol were preliminarily
distilled. Dibutyl succinate (I) was synthesized accord-
ing to the procedure described in [20] and was purified
by rectification. The catalyst contained 15% of Ni,
10% of Co, 3.5% of Fe, and 5% of Al2O3 on hydro-
thermally treated silica gel; it was prepared by im-
pregnation of silica gel with a solution containing
nitrates of the corresponding metals, followed by dry-
ing, calcination, and reduction in a stream of hydrogen
at 400°C. The catalyst was then purged with nitrogen,
passivated with air, and ground to a required grain size.
8. Abreimova, M.A., Bobyleva, L.I., Kryukov, S.I., Sred-
nev, S.S., Moskvichev, Yu.A., Karpov, O.P., and Surov-
tsev, A.A., Abstracts of Papers, V konferentsiya po
intensifikatsii neftekhimicheskikh protsessov “Nefte-
khimiya-99” (Vth Conf. on Intensification of Petro-
chemical Processes “Petrochemistry 99”), Nizhne-
kamsk: Nizhnekamskneftekhim, 1999, vol. 2, p. 26.
9. Onoda, T., J. Synth. Org. Chem. Jpn., 2000, vol. 58,
p. 399; Ref. Zh., Khim., 2002, no. 19N142.
10. Hunter, S.E., Ehrenberger, C.E., and Savage, P.E.,
J. Org. Chem., 2006, vol. 71, p. 6229.
11. Wood, M.A., Willett, P., Wild, R., and Colley, S.W.,
EU Patent Appl. no. 1108702, 2001; Chem. Abstr.,
2001, vol. 135, no. 47921.
12. Chaudhari, R.V. and Vaidya, S.H., Indian Patent
no. 185714, 2001; Chem. Abstr., 2005, vol. 142,
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13. Borchert, H., Schlitter, S., Hesse, M., Stein, F.,
Fischer, R.-H., Rahn, R.-T., Week, A., and Roesch, M.,
FRG Patent no. 10061558, 2002; Chem. Abstr., 2002,
vol. 137, no. 34773.
14. Chaudhari, R.V., Jaganathan, R., Chaudhari, S.T., and
Rode, Ch.V., US Patent no. 7037877, 2006; Chem.
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The kinetic measurements were performed in
a rocking 60-ml stainless steel high-pressure reactor
under continuous stirring while controlling pressure
and temperature. Before charging into the reactor, the
catalyst was depassivated in a glass reactor at 300°C in
a stream of hydrogen. To prevent contact with air, the
catalyst was covered with the initial compound while
transferring it into the reactor; 0.75–1.5 g of the cata-
lyst and 16–22 g of the substrate were used. Samples
were withdrawn from the reaction mixture at definite
time intervals, and their composition was determined
by GLC.
15. Guo, R., Qiao, M., Zhu, Y., Fan, K., Zhang, X.,
Zhao, Z., and He, M., Chinese Patent no. 1857771,
2006; Chem. Abstr., 2006, vol. 145, no. 478628.
This study was performed under financial support
by the Federal Science and Innovation Agency (state
contract no. 02.513.12.3076).
16. Kanetaka, J., Kiryu, S., Asano, T., and Masamune, S.,
Bull. Jpn. Petrol. Inst., 1970, p. 89.
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RUSSIAN JOURNAL OF ORGANIC CHEMISTRY Vol. 46 No. 10 2010