Uses of metallacyclobutenes in heterocyclic synthesis. Synthesis and structural characterization of 1,2-dihydrophosphetes
作者:Kenneth M. Doxsee、Gregory S. Shen、Carolyn B. Knobler
DOI:10.1021/ja00207a035
日期:1989.12
Synthese de dihydro-1,2 triphenyl-1,3,4 (ou alkyl-1 diphenyl-3,4) phosphete a partir de di-[η 5 -cyclopentadienyl]-1,1 diphenyl-2,3 zirconacyclo butene-2 et de phenyl (ou alkyl) dichloro phosphine
合成这些 de dihydro-1,2 triphenyl-1,3,4 (oualkyl-1 diphenyl-3,4) phosphete a partir de di-[η 5 -cyclopentadienyl]-1,1 diphenyl-2,3 zirconacyclobutene-2 et de 苯基 (ou 烷基) 二氯膦
Chemoselective Phosphination of Titanacyclobutene: A Convenient Method for Synthesis of Allylphosphine Derivatives
作者:Yiqing Zhou、Chao Chen、Xiaoyu Yan、Chanjuan Xi
DOI:10.1021/om500084j
日期:2014.2.24
Titanacyclobutenes reacted with chlorophosphine to afford titanoallylphosphines with high chemoselectivity, and the resulting titanoallylphosphine could be converted into functionalized allylphosphine sulfides via reactions with various electrophiles.
Regioselectivity of metallacycle formation via intramolecular CH activation
作者:Kenneth M Doxsee、Jerrick J.J Juliette
DOI:10.1016/s0277-5387(00)00325-9
日期:2000.4
the observed regioselectivities, and this effect is sufficiently pronounced to lead to preferential γ-aliphatic CH activation even in the presence of γ-aromatic hydrogens. The titanacyclopropanes may be alternatively formulated as allene complexes of titanocene. An independently prepared trimethylphosphine-ligated analog of 3-methyl-1,2-butadiene, representing the first titanocene allene complex to be
作者:K. A. Brown-Wensley、S. L. Buchwald、L. Cannizzo、L. Clawson、S. Ho、D. Meinhardt、J. R. Stille、D. Straus、Robert H. Grubbs
DOI:10.1351/pac198355111733
日期:1983.1.1
can be generated in situ from either its aluminum alkyl adducts or olefin adducts (metallacyclobutanes). This complex reacts with a wide variety of unsaturated functionalities including c=O, c=C,-c≡c- and –C≡N. In most instances the c:O groups are methylenated. Key to the utility of these complexes is their lack of basic properties in contrast with phosphorous ylides; all of the normal "Wittig" side
Titanacyclobutenes, readily prepared from Cp2TiCH2·Al(CH3)2Cl and alkynes, react with ketones and aldehydes to afford metallacyclic products resulting from insertion into either the titanium-alkyl or the titanium-vinyl bond of the titanacyclobutene. The latter insertion products are thermally unstable, undergoing facile retro [4+2] cycloaddition to afford substituted 1,3-dienes in good yield.