Syntheses and properties of sila-functional oligosiloxanes: A simple and practical method for the synthesis of 1,1,3,3-tetra-isocyanato-1,3-disubstituted disiloxane

Chemistry Letters

Volumn , Issue 3, 1999, Pages 259-260

  Abe, Yoshimoto ^a   Abe, Koji ^a   Watanabe, Miho ^a   Gunji, Takahiro ^a  

^a TOKYO UNIVERSITY OF SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0033246942     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1999.259     Document Type: Article

References (12)

1. V. P. Kozyukov, V. D. Sheludyakov, and V. F. Mironov, Rus. Chem. Rev., 42, 662 (1973).
2. R. G. Neville and J. J. McGee, Can. J. Chem., 41, 2123 (1961).
3. V. Wannagat and C. Kruger, Monatsh., 94, 63 (1963).
4. Y. Abe, K. Motoyama, T. Kobayashi, T. Iwasaki, and T. Gunji, Nippon Kagaku Kaishi, 1996, 969.
5. Y. Abe, T. Kanemaru, T. Yamazaki, Y. Nagao, and T. Misono, Nippon Kagaku Kaishi, 1991, 1094.
6. Y. Abe, A. Ito, Y. Kuno, Y. Nagao, and T. Misono, Nippon Kagaku Kaishi, 1992, 649.
7. Y. Abe, M. Kondou, Y. Nagao, and T. Misono, Chem. Exp., 6, 117 (1991).
8. T. Gunji, A. Setogawa, K. Asakura, and Y. Abe, Bull. Chem. Soc. Jpn., 71, 2967 (1998).
9. 2: Si, 19.1%.
10. 2: Si, 14.2%.
11. For example, the synthetic procedure of 1′ is outlined as follows: Compd. 1 (84.5 g) was placed in a 1 L four necked flask. A mixture of water (4.5 g) and 1,4-dioxane (50 mL) was added in the another flask, which is attached to the four necked flask via a stop cock and a flow meter. The four necked flask was heated to 110 °C to reflux 1 at 25 Torr. The flask containing the mixture of water and 1,4-dioxane was heated to 40 °C and the evaporation rate of the mixture (500 mL/min) was regulated by the flow meter and the stop cock. When the mixture evaporated totally after three hours, the remaining was subjected to distillation under reduced pressure to afford 1′ in 85% yield.
12. K. A. Andrianov, U. N. Emel'yanov, and V. I. Troenko, Doklady Akademii Nauk SSSR, 189, 91 (1969).