Highly Regiocontrolled and Efficient Synthesis of Vinyl- and Allylstannanes via Lewis Acids and Pd-Catalyzed Hydrostannation of Allenes: Scope and Limitations.
The hydrostannation of allenes 1 with tributylstannyl hydride in the presence of B(C(6)F(5))(3) catalyst produced vinylstannanes 2 regioselectively, whereas the hydrostannation of 1 with tributylstannyl and triphenylstannyl hydride in the presence of Pd(PPh(3))(4) catalyst gave allylstannanes 5,6 regio- and stereo (in certain cases)-selectively. The mechanisms for these catalytic reactions were proposed.
Gevorgyan
Vladimir
V
Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-77, Japan.
Liu
Jian-Xiu
JX
Yamamoto
Yoshinori
Y