Generation and trapping reaction of an efficient 1,2-dehydrocarborane precursor, phenyl[o-(trimethylsilyl)carboranyl]iodonium acetate.
An efficient 1,2-dehydrocarborane precursor, phenyl[o-(trimethylsilyl)carboranyl]iodonium acetate, was readily prepared by reaction of [o-(trimethylsilyl)carboranyl]lithium and IPh(OAc)2. The facile 2+4 cycloaddition of with dienes such as anthracene, naphthalene, norborna-2,5-diene and 2,5-dimethylfuran gave high yields of the 1,2-dehydrocarborane adducts in the presence of a desilylating agent. The reaction of with a cyclic alkene and strained cycloalkynes afforded the adducts formed by the ene reaction and the 2+2 cycloaddition reaction. The reaction of with a bicyclopalladacycle yielded the cyclization product. The structures of compounds and were determined by single-crystal X-ray crystallography.
Lee
Taegweon
T
Department of Chemistry, Korea University, Jochiwon, Chungnam 339-700, Korea.
Jeon
Joonsang
J
Song
Kyu Ho
KH
Jung
Il
I
Baik
Chul
C
Park
Ki-Min
KM
Lee
Shim Sung
SS
Kang
Sang Ook
SO
Ko
Jaejung
J