摘要:
On reaction of chloromethylchlorophosphines Cl(R)P-CH2-Cl with Pd(Ph3P)(4) the C-Cl bond is selectively activated by oxidative addition to Pd(0), unusual dipalladium complexes with P-Cl functional eta(2),mu(2){CH2-P(R)Cl} bridges being formed with high diastereoselectivity. The X-ray structure of 3a (R = tBu) reveals a chair-shaped Pd2P2C2 six-membered ring system with the substituents (Cl, tBu) at the two m(2)-P atoms in cis-position. (C) 1998 Elsevier Science S.A. All rights reserved.