Tetrahedron Letters p. 2347 - 2350 (1993)
Update date:2022-08-03
Topics:
Ishii, Akihiko
Tsuchiya, Tsuyoshi
Nakayama, Juzo
Hoshino, Masamatsu
The reactions of the trilithium salt 7, prepared from 5 or 6. with diethyl carbonate and triphenyl phosphite yield 4-sila and 8-phospha-4-silathiophenetriptycenes, 2 and 3, respectively. In the UV-Vis spectra of 2 and 3, the longest absorption maxima appear at 297 and 308 nm, respectively, and, in the 13P NMR, the phosphorus atom of 3 resonates at °-92.15. Treatment of 3 with m-CPBA or cyclohexene sulfide gives the corresponding phosphine oxide (8) or phosphine sulfide (9), respectively, while the reaction of 3 with S8/DBU gives the corresponding gives disiloxane 10.
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Doi:10.1002/anie.202105307
(2021)Doi:10.1016/j.carres.2006.08.022
(2006)Doi:10.1016/S0040-4020(01)80383-5
(1993)Doi:10.1016/S0040-4020(01)90216-9
(1993)Doi:10.1039/P19930001019
(1993)Doi:10.1039/DT9930001261
(1993)