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References and notes
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treatment of arenesulfonyl chlorides with titanium iso-
propoxide in the presence of a palladium catalyst. See Ref.
4i.
6. Blum, J.; Scharf, G. J. Org. Chem. 1970, 35, 1895.
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See: Porta, F.; Cenini, S. J. Organomet. Chem. 1980, 194,
211.
11. Synthesis of (PhSO2)PdCl(PPh3)2 4 (Ar=Ph): Benzene-
sulfonyl chloride (60.0 mg, 0.339 mmol) was added to a
methylene dichloride (5 mL) solution of tetrakis(triphen-
ylphosphine)palladium (147 mg, 0.125 mmol) at room
temperature. The color changed immediately from green-
ish yellow to yellow with yellow precipitates. After 10 min,
volatiles were evaporated, the residue was washed with
ether (3 mL, twice) and was dried in vacuo to afford the
complex (94 mg, 93% yield), which was identical with a
sample synthesized according to Ref. 12: Cream yellow
powder, mp (under Ar) 165–170 ꢁC (lit.12 170–176 ꢁC); 1H
NMR (CDCl3, 300 MHz) d 7.72–7.30 and 6.93–6.85 (m,
35H, aromatic); 31P{1H} NMR (CDCl3, 162 MHz) d 23.7;
IR (KBr) 1217, 1095 (mS@O).
12. (PhSO2)PdCl(PPh3)2 has been prepared by a different
route. See: Chiswell, B.; Venanzi, L. M. J. Chem. Soc. A.
1966, 1246.
13. Flemming, J. P.; Pilon, M. C.; Borbulevitch, O. Ya;
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´
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