Tetrahedron Letters p. 8259 - 8262 (1993)
Update date:2022-08-04
Topics:
Ishii, Akihiko
Yoshioka, Rie
Nakayama, Juzo
Hoshino, Masamatsu
Unsubstituted and trimethyl-4,8-diphosphathiophenetriptycenes (4 and 3d) were synthesized by reduction of the corresponding phosphine oxides (8a and 8b) with trichlorosilane which were prepared by the reaction of trilithium salts, derived from tri-3-thienylphosphine oxides (7a and 7b), with P(OPh)3. The reaction of 3d with W(CO)5(THF) gave a 1:2 complex 12 in high yield.
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