PLATINUM(0)-CATALYZED DIBORATION OF ALLENES WITH BIS(PINACOLATO)DIBORON

Authors
ISHIYAMA T KITANO T MIYAURA N
Citation
T. Ishiyama et al., PLATINUM(0)-CATALYZED DIBORATION OF ALLENES WITH BIS(PINACOLATO)DIBORON, Tetrahedron letters, 39(16), 1998, pp. 2357-2360
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
39
Issue
16
Year of publication
1998
Pages
2357 - 2360
Database
ISI
SICI code
0040-4039(1998)39:16<2357:PDOAWB>2.0.ZU;2-D
Abstract
Addition of bis(pinacolato)diboron [(Me4C2O2)B-B(O2C2Me4)] to various allenes was carried out in excellent yields in the presence of Pt(PPh3 )(4) at 80 degrees C or Pt(dbn)(2)/(c-Hex)(3)P at 50 degrees C. The ad dition to internal double bond was predominant for monosubstituted all enes, whereas the terminal diboration products were regioselectively o btained when a sterically bulky phosphine ligand of (c-Hex)(3)P and 1, 1-disubstituted allenes were used. (C) 1998 Elsevier Science Ltd. All rights reserved.